121010023021 has 2 divisors, whose sum is σ = 121010023022. Its totient is φ = 121010023020.

The previous prime is 121010022953. The next prime is 121010023081. The reversal of 121010023021 is 120320010121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120488128996 + 521894025 = 347114^2 + 22845^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010023021 - 2⁹ = 121010022509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121010022992 and 121010023010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121010023081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505011510 + 60505011511.

It is an arithmetic number, because the mean of its divisors is an integer number (60505011511).

Almost surely, 2^121010023021 is an apocalyptic number.

It is an amenable number.

121010023021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010023021 is an equidigital number, since it uses as much as digits as its factorization.

121010023021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121010023021 its reverse (120320010121), we get a palindrome (241330033142).

The spelling of 121010023021 in words is "one hundred twenty-one billion, ten million, twenty-three thousand, twenty-one".