20210212131 has 4 divisors (see below), whose sum is σ = 26946949512. Its totient is φ = 13473474752.

The previous prime is 20210212117. The next prime is 20210212147. The reversal of 20210212131 is 13121201202.

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 20210212131 - 2²² = 20206017827 is a prime.

It is a super-2 number, since 2×20210212131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20210212131.

It is not an unprimeable number, because it can be changed into a prime (20210212151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368368686 + ... + 3368368691.

It is an arithmetic number, because the mean of its divisors is an integer number (6736737378).

Almost surely, 2^20210212131 is an apocalyptic number.

20210212131 is a deficient number, since it is larger than the sum of its proper divisors (6736737381).

20210212131 is an equidigital number, since it uses as much as digits as its factorization.

20210212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6736737380.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20210212131 its reverse (13121201202), we get a palindrome (33331413333).

The spelling of 20210212131 in words is "twenty billion, two hundred ten million, two hundred twelve thousand, one hundred thirty-one".