1220210205 has 8 divisors (see below), whose sum is σ = 1952336352. Its totient is φ = 650778768.

The previous prime is 1220210171. The next prime is 1220210209. The reversal of 1220210205 is 5020120221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220210205 - 2¹⁸ = 1219948061 is a prime.

It is a super-2 number, since 2×1220210205² = 2977825888772284050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 81347347 = 1220210205 / (1 + 2 + 2 + 0 + 2 + 1 + 0 + 2 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220210209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40673659 + ... + 40673688.

It is an arithmetic number, because the mean of its divisors is an integer number (244042044).

Almost surely, 2^1220210205 is an apocalyptic number.

1220210205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220210205 is a deficient number, since it is larger than the sum of its proper divisors (732126147).

1220210205 is an equidigital number, since it uses as much as digits as its factorization.

1220210205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81347355.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1220210205 is about 34931.5073393634. The cubic root of 1220210205 is about 1068.5910955568.

Adding to 1220210205 its reverse (5020120221), we get a palindrome (6240330426).

The spelling of 1220210205 in words is "one billion, two hundred twenty million, two hundred ten thousand, two hundred five".