121937985121 has 24 divisors (see below), whose sum is σ = 133142711040. Its totient is φ = 111443492160.

The previous prime is 121937985119. The next prime is 121937985131. The reversal of 121937985121 is 121589739121.

It is not a de Polignac number, because 121937985121 - 2¹ = 121937985119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121937985131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1711221 + ... + 1781053.

It is an arithmetic number, because the mean of its divisors is an integer number (5547612960).

Almost surely, 2^121937985121 is an apocalyptic number.

It is an amenable number.

121937985121 is a deficient number, since it is larger than the sum of its proper divisors (11204725919).

121937985121 is an equidigital number, since it uses as much as digits as its factorization.

121937985121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69997 (or 69966 counting only the distinct ones).

The product of its digits is 272160, while the sum is 49.

The spelling of 121937985121 in words is "one hundred twenty-one billion, nine hundred thirty-seven million, nine hundred eighty-five thousand, one hundred twenty-one".