121111302300021 has 24 divisors (see below), whose sum is σ = 197422812531360. Its totient is φ = 70869727572000.

The previous prime is 121111302299983. The next prime is 121111302300061. The reversal of 121111302300021 is 120003203111121.

121111302300021 is a `hidden beast` number, since 1 + 211 + 1 + 130 + 2 + 300 + 0 + 21 = 666.

It is not a de Polignac number, because 121111302300021 - 2⁶ = 121111302299957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121111302299967 and 121111302300003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111302300061) 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, 21092177955 + ... + 21092183696.

It is an arithmetic number, because the mean of its divisors is an integer number (8225950522140).

Almost surely, 2^{121111302300021} is an apocalyptic number.

121111302300021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121111302300021 is a deficient number, since it is larger than the sum of its proper divisors (76311510231339).

121111302300021 is a wasteful number, since it uses less digits than its factorization.

121111302300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42184361697 (or 42184361694 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121111302300021 its reverse (120003203111121), we get a palindrome (241114505411142).

The spelling of 121111302300021 in words is "one hundred twenty-one trillion, one hundred eleven billion, three hundred two million, three hundred thousand, twenty-one".