121120102021 has 2 divisors, whose sum is σ = 121120102022. Its totient is φ = 121120102020.

The previous prime is 121120102013. The next prime is 121120102067. The reversal of 121120102021 is 120201021121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111298300996 + 9821801025 = 333614^2 + 99105^2 .

It is a cyclic number.

It is not a de Polignac number, because 121120102021 - 2³ = 121120102013 is a prime.

It is a super-2 number, since 2×121120102021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121120101992 and 121120102010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121120102001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560051010 + 60560051011.

It is an arithmetic number, because the mean of its divisors is an integer number (60560051011).

Almost surely, 2^121120102021 is an apocalyptic number.

It is an amenable number.

121120102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121120102021 is an equidigital number, since it uses as much as digits as its factorization.

121120102021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121120102021 its reverse (120201021121), we get a palindrome (241321123142).

The spelling of 121120102021 in words is "one hundred twenty-one billion, one hundred twenty million, one hundred two thousand, twenty-one".