20210021220131 has 2 divisors, whose sum is σ = 20210021220132. Its totient is φ = 20210021220130.

The previous prime is 20210021220089. The next prime is 20210021220149. The reversal of 20210021220131 is 13102212001202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20210021220131 - 2¹⁰ = 20210021219107 is a prime.

It is a super-2 number, since 2×20210021220131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20210021220931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105010610065 + 10105010610066.

It is an arithmetic number, because the mean of its divisors is an integer number (10105010610066).

Almost surely, 2^{20210021220131} is an apocalyptic number.

20210021220131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210021220131 is an equidigital number, since it uses as much as digits as its factorization.

20210021220131 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 20210021220131 its reverse (13102212001202), we get a palindrome (33312233221333).

The spelling of 20210021220131 in words is "twenty trillion, two hundred ten billion, twenty-one million, two hundred twenty thousand, one hundred thirty-one".