120113110021 has 2 divisors, whose sum is σ = 120113110022. Its totient is φ = 120113110020.

The previous prime is 120113110001. The next prime is 120113110031. The reversal of 120113110021 is 120011311021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77220628996 + 42892481025 = 277886^2 + 207105^2 .

It is a cyclic number.

It is not a de Polignac number, because 120113110021 - 2¹⁷ = 120112978949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120113109983 and 120113110010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120113110001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60056555010 + 60056555011.

It is an arithmetic number, because the mean of its divisors is an integer number (60056555011).

Almost surely, 2^120113110021 is an apocalyptic number.

It is an amenable number.

120113110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120113110021 is an equidigital number, since it uses as much as digits as its factorization.

120113110021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 120113110021 its reverse (120011311021), we get a palindrome (240124421042).

The spelling of 120113110021 in words is "one hundred twenty billion, one hundred thirteen million, one hundred ten thousand, twenty-one".