101031013021 has 2 divisors, whose sum is σ = 101031013022. Its totient is φ = 101031013020.

The previous prime is 101031012961. The next prime is 101031013051. The reversal of 101031013021 is 120310130101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100460472025 + 570540996 = 316955^2 + 23886^2 .

It is a cyclic number.

It is not a de Polignac number, because 101031013021 - 2²⁵ = 100997458589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101031012992 and 101031013010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101031013051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50515506510 + 50515506511.

It is an arithmetic number, because the mean of its divisors is an integer number (50515506511).

Almost surely, 2^101031013021 is an apocalyptic number.

It is an amenable number.

101031013021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101031013021 is an equidigital number, since it uses as much as digits as its factorization.

101031013021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 101031013021 its reverse (120310130101), we get a palindrome (221341143122).

The spelling of 101031013021 in words is "one hundred one billion, thirty-one million, thirteen thousand, twenty-one".