21374270011091 has 2 divisors, whose sum is σ = 21374270011092. Its totient is φ = 21374270011090.

The previous prime is 21374270011069. The next prime is 21374270011099. The reversal of 21374270011091 is 19011007247312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21374270011091 is a prime.

It is not a weakly prime, because it can be changed into another prime (21374270011099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10687135005545 + 10687135005546.

It is an arithmetic number, because the mean of its divisors is an integer number (10687135005546).

Almost surely, 2^{21374270011091} is an apocalyptic number.

21374270011091 is a deficient number, since it is larger than the sum of its proper divisors (1).

21374270011091 is an equidigital number, since it uses as much as digits as its factorization.

21374270011091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 21374270011091 in words is "twenty-one trillion, three hundred seventy-four billion, two hundred seventy million, eleven thousand, ninety-one".