221010210211331 has 2 divisors, whose sum is σ = 221010210211332. Its totient is φ = 221010210211330.

The previous prime is 221010210211171. The next prime is 221010210211333. The reversal of 221010210211331 is 133112012010122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221010210211331 is a prime.

It is a super-2 number, since 2×221010210211331² (a number of 29 digits) contains 22 as substring.

Together with 221010210211333, 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 (221010210211333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505105105665 + 110505105105666.

It is an arithmetic number, because the mean of its divisors is an integer number (110505105105666).

Almost surely, 2^{221010210211331} is an apocalyptic number.

221010210211331 is a deficient number, since it is larger than the sum of its proper divisors (1).

221010210211331 is an equidigital number, since it uses as much as digits as its factorization.

221010210211331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 221010210211331 its reverse (133112012010122), we get a palindrome (354122222221453).

The spelling of 221010210211331 in words is "two hundred twenty-one trillion, ten billion, two hundred ten million, two hundred eleven thousand, three hundred thirty-one".