121227311656 has 64 divisors (see below), whose sum is σ = 262921464000. Its totient is φ = 51822005760.

The previous prime is 121227311573. The next prime is 121227311657. The reversal of 121227311656 is 656113722121.

It is a super-2 number, since 2×121227311656² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121227311657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35551 + ... + 493678.

It is an arithmetic number, because the mean of its divisors is an integer number (4108147875).

Almost surely, 2^121227311656 is an apocalyptic number.

It is an amenable number.

121227311656 is an abundant number, since it is smaller than the sum of its proper divisors (141694152344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121227311656 is a wasteful number, since it uses less digits than its factorization.

121227311656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529402 (or 529398 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The spelling of 121227311656 in words is "one hundred twenty-one billion, two hundred twenty-seven million, three hundred eleven thousand, six hundred fifty-six".