1202121221 has 12 divisors (see below), whose sum is σ = 1459423968. Its totient is φ = 969776832.

The previous prime is 1202121191. The next prime is 1202121257. The reversal of 1202121221 is 1221212021.

It is not a de Polignac number, because 1202121221 - 2¹⁰ = 1202120197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1202121196 and 1202121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202121281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295091 + ... + 299136.

It is an arithmetic number, because the mean of its divisors is an integer number (121618664).

Almost surely, 2^1202121221 is an apocalyptic number.

It is an amenable number.

1202121221 is a deficient number, since it is larger than the sum of its proper divisors (257302747).

1202121221 is an equidigital number, since it uses as much as digits as its factorization.

1202121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594268 (or 594251 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1202121221 is about 34671.6198208275. The cubic root of 1202121221 is about 1063.2843488428.

Adding to 1202121221 its reverse (1221212021), we get a palindrome (2423333242).

The spelling of 1202121221 in words is "one billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty-one".