21020212020131 has 2 divisors, whose sum is σ = 21020212020132. Its totient is φ = 21020212020130.

The previous prime is 21020212020109. The next prime is 21020212020167. The reversal of 21020212020131 is 13102021202012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020212020131 is a prime.

It is a super-2 number, since 2×21020212020131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21020212020631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510106010065 + 10510106010066.

It is an arithmetic number, because the mean of its divisors is an integer number (10510106010066).

Almost surely, 2^{21020212020131} is an apocalyptic number.

21020212020131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020212020131 is an equidigital number, since it uses as much as digits as its factorization.

21020212020131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21020212020131 its reverse (13102021202012), we get a palindrome (34122233222143).

The spelling of 21020212020131 in words is "twenty-one trillion, twenty billion, two hundred twelve million, twenty thousand, one hundred thirty-one".