1214221031 has 4 divisors (see below), whose sum is σ = 1214617200. Its totient is φ = 1213824864.

The previous prime is 1214221013. The next prime is 1214221061. The reversal of 1214221031 is 1301224121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1214221031 is a prime.

It is a super-2 number, since 2×1214221031² = 2948665424245405922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214221061) 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 3 ways as a sum of consecutive naturals, for example, 193451 + ... + 199628.

It is an arithmetic number, because the mean of its divisors is an integer number (303654300).

Almost surely, 2^1214221031 is an apocalyptic number.

1214221031 is a deficient number, since it is larger than the sum of its proper divisors (396169).

1214221031 is an equidigital number, since it uses as much as digits as its factorization.

1214221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396168.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1214221031 is about 34845.6744948351. The cubic root of 1214221031 is about 1066.8399006510.

Adding to 1214221031 its reverse (1301224121), we get a palindrome (2515445152).

The spelling of 1214221031 in words is "one billion, two hundred fourteen million, two hundred twenty-one thousand, thirty-one".