121115772272 has 20 divisors (see below), whose sum is σ = 255994700856. Its totient is φ = 55052623680.

The previous prime is 121115772269. The next prime is 121115772277. The reversal of 121115772272 is 272277511121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121115772277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344078723 + ... + 344079074.

Almost surely, 2^121115772272 is an apocalyptic number.

It is an amenable number.

121115772272 is an abundant number, since it is smaller than the sum of its proper divisors (134878928584).

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

121115772272 is a wasteful number, since it uses less digits than its factorization.

121115772272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688157816 (or 688157810 counting only the distinct ones).

The product of its digits is 27440, while the sum is 38.

The spelling of 121115772272 in words is "one hundred twenty-one billion, one hundred fifteen million, seven hundred seventy-two thousand, two hundred seventy-two".