121011020010021 has 32 divisors (see below), whose sum is σ = 176774474304000. Its totient is φ = 73339848646848.

The previous prime is 121011020010017. The next prime is 121011020010029. The reversal of 121011020010021 is 120010020110121.

It is not a de Polignac number, because 121011020010021 - 2² = 121011020010017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121011020009979 and 121011020010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011020010029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224291631 + ... + 224830508.

It is an arithmetic number, because the mean of its divisors is an integer number (5524202322000).

Almost surely, 2^{121011020010021} is an apocalyptic number.

It is an amenable number.

121011020010021 is a deficient number, since it is larger than the sum of its proper divisors (55763454293979).

121011020010021 is a wasteful number, since it uses less digits than its factorization.

121011020010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449122353.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121011020010021 its reverse (120010020110121), we get a palindrome (241021040120142).

The spelling of 121011020010021 in words is "one hundred twenty-one trillion, eleven billion, twenty million, ten thousand, twenty-one".