121032121021 has 16 divisors (see below), whose sum is σ = 139603546368. Its totient is φ = 102781728000.

The previous prime is 121032121009. The next prime is 121032121069. The reversal of 121032121021 is 120121230121.

It is not a de Polignac number, because 121032121021 - 2¹⁵ = 121032088253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121032120986 and 121032121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121032124021) 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, 1987851 + ... + 2047831.

It is an arithmetic number, because the mean of its divisors is an integer number (8725221648).

Almost surely, 2^121032121021 is an apocalyptic number.

It is an amenable number.

121032121021 is a deficient number, since it is larger than the sum of its proper divisors (18571425347).

121032121021 is a wasteful number, since it uses less digits than its factorization.

121032121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62652.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121032121021 its reverse (120121230121), we get a palindrome (241153351142).

The spelling of 121032121021 in words is "one hundred twenty-one billion, thirty-two million, one hundred twenty-one thousand, twenty-one".