121310230300021 has 16 divisors (see below), whose sum is σ = 146752410355200. Its totient is φ = 97957233873648.

The previous prime is 121310230299991. The next prime is 121310230300033. The reversal of 121310230300021 is 120003032013121.

It is a cyclic number.

It is not a de Polignac number, because 121310230300021 - 2⁹ = 121310230299509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310230300081) 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, 2547761095 + ... + 2547808708.

It is an arithmetic number, because the mean of its divisors is an integer number (9172025647200).

Almost surely, 2^{121310230300021} is an apocalyptic number.

It is an amenable number.

121310230300021 is a deficient number, since it is larger than the sum of its proper divisors (25442180055179).

121310230300021 is a wasteful number, since it uses less digits than its factorization.

121310230300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095570008.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121310230300021 its reverse (120003032013121), we get a palindrome (241313262313142).

The spelling of 121310230300021 in words is "one hundred twenty-one trillion, three hundred ten billion, two hundred thirty million, three hundred thousand, twenty-one".