21020313020131 has 4 divisors (see below), whose sum is σ = 21125942734000. Its totient is φ = 20914683306264.

The previous prime is 21020313020093. The next prime is 21020313020227. The reversal of 21020313020131 is 13102031302012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21020313020131 - 2²⁵ = 21020279465699 is a prime.

It is a super-2 number, since 2×21020313020131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020313020099 and 21020313020108.

It is not an unprimeable number, because it can be changed into a prime (21020313026131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52814856636 + ... + 52814857033.

It is an arithmetic number, because the mean of its divisors is an integer number (5281485683500).

Almost surely, 2^{21020313020131} is an apocalyptic number.

21020313020131 is a deficient number, since it is larger than the sum of its proper divisors (105629713869).

21020313020131 is a wasteful number, since it uses less digits than its factorization.

21020313020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105629713868.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21020313020131 its reverse (13102031302012), we get a palindrome (34122344322143).

The spelling of 21020313020131 in words is "twenty-one trillion, twenty billion, three hundred thirteen million, twenty thousand, one hundred thirty-one".