121445634511256 has 32 divisors (see below), whose sum is σ = 254470342830480. Its totient is φ = 53856157209600.

The previous prime is 121445634511247. The next prime is 121445634511259. The reversal of 121445634511256 is 652115436544121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121445634511259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16830045521 + ... + 16830052736.

Almost surely, 2^{121445634511256} is an apocalyptic number.

It is an amenable number.

121445634511256 is an abundant number, since it is smaller than the sum of its proper divisors (133024708319224).

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

121445634511256 is a wasteful number, since it uses less digits than its factorization.

121445634511256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33660098315 (or 33660098311 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 50.

The spelling of 121445634511256 in words is "one hundred twenty-one trillion, four hundred forty-five billion, six hundred thirty-four million, five hundred eleven thousand, two hundred fifty-six".