121333010021 has 4 divisors (see below), whose sum is σ = 121333930944. Its totient is φ = 121332089100.

The previous prime is 121333009997. The next prime is 121333010041. The reversal of 121333010021 is 120010333121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121333010021 - 2²⁶ = 121265901157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121333010041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221495 + ... + 540116.

It is an arithmetic number, because the mean of its divisors is an integer number (30333482736).

Almost surely, 2^121333010021 is an apocalyptic number.

It is an amenable number.

121333010021 is a deficient number, since it is larger than the sum of its proper divisors (920923).

121333010021 is an equidigital number, since it uses as much as digits as its factorization.

121333010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920922.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 121333010021 its reverse (120010333121), we get a palindrome (241343343142).

The spelling of 121333010021 in words is "one hundred twenty-one billion, three hundred thirty-three million, ten thousand, twenty-one".