212021131291 has 2 divisors, whose sum is σ = 212021131292. Its totient is φ = 212021131290.

The previous prime is 212021131279. The next prime is 212021131303. The reversal of 212021131291 is 192131120212.

It is a balanced prime because it is at equal distance from previous prime (212021131279) and next prime (212021131303).

It is a cyclic number.

It is not a de Polignac number, because 212021131291 - 2⁷ = 212021131163 is a prime.

It is a super-2 number, since 2×212021131291² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212021131691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010565645 + 106010565646.

It is an arithmetic number, because the mean of its divisors is an integer number (106010565646).

Almost surely, 2^212021131291 is an apocalyptic number.

212021131291 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021131291 is an equidigital number, since it uses as much as digits as its factorization.

212021131291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 212021131291 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-one thousand, two hundred ninety-one".