212021100131 has 2 divisors, whose sum is σ = 212021100132. Its totient is φ = 212021100130.

The previous prime is 212021100121. The next prime is 212021100133. The reversal of 212021100131 is 131001120212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021100131 is a prime.

It is a super-2 number, since 2×212021100131² (a number of 23 digits) contains 22 as substring.

Together with 212021100133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212021100133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010550065 + 106010550066.

It is an arithmetic number, because the mean of its divisors is an integer number (106010550066).

Almost surely, 2^212021100131 is an apocalyptic number.

212021100131 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021100131 is an equidigital number, since it uses as much as digits as its factorization.

212021100131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 212021100131 its reverse (131001120212), we get a palindrome (343022220343).

The spelling of 212021100131 in words is "two hundred twelve billion, twenty-one million, one hundred thousand, one hundred thirty-one".