21022131220291 has 2 divisors, whose sum is σ = 21022131220292. Its totient is φ = 21022131220290.

The previous prime is 21022131220229. The next prime is 21022131220339. The reversal of 21022131220291 is 19202213122012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022131220291 - 2²⁵ = 21022097665859 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022131290291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511065610145 + 10511065610146.

It is an arithmetic number, because the mean of its divisors is an integer number (10511065610146).

Almost surely, 2^{21022131220291} is an apocalyptic number.

21022131220291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022131220291 is an equidigital number, since it uses as much as digits as its factorization.

21022131220291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 21022131220291 in words is "twenty-one trillion, twenty-two billion, one hundred thirty-one million, two hundred twenty thousand, two hundred ninety-one".