121225072872 has 32 divisors (see below), whose sum is σ = 303658120800. Its totient is φ = 40328965824.

The previous prime is 121225072811. The next prime is 121225072907. The reversal of 121225072872 is 278270522121.

121225072872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 121225072872.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4949518 + ... + 4973949.

It is an arithmetic number, because the mean of its divisors is an integer number (9489316275).

Almost surely, 2^121225072872 is an apocalyptic number.

121225072872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121225072872 is an abundant number, since it is smaller than the sum of its proper divisors (182433047928).

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

121225072872 is a wasteful number, since it uses less digits than its factorization.

121225072872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9923985 (or 9923981 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

Adding to 121225072872 its reverse (278270522121), we get a palindrome (399495594993).

The spelling of 121225072872 in words is "one hundred twenty-one billion, two hundred twenty-five million, seventy-two thousand, eight hundred seventy-two".