210221112011639 has 2 divisors, whose sum is σ = 210221112011640. Its totient is φ = 210221112011638.

The previous prime is 210221112011627. The next prime is 210221112011719. The reversal of 210221112011639 is 936110211122012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210221112011639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210221112011039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110556005819 + 105110556005820.

It is an arithmetic number, because the mean of its divisors is an integer number (105110556005820).

Almost surely, 2^{210221112011639} is an apocalyptic number.

210221112011639 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221112011639 is an equidigital number, since it uses as much as digits as its factorization.

210221112011639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 210221112011639 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twelve million, eleven thousand, six hundred thirty-nine".