21332212011391 has 2 divisors, whose sum is σ = 21332212011392. Its totient is φ = 21332212011390.

The previous prime is 21332212011377. The next prime is 21332212011521. The reversal of 21332212011391 is 19311021223312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332212011391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21332212014391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666106005695 + 10666106005696.

It is an arithmetic number, because the mean of its divisors is an integer number (10666106005696).

Almost surely, 2^{21332212011391} is an apocalyptic number.

21332212011391 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332212011391 is an equidigital number, since it uses as much as digits as its factorization.

21332212011391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21332212011391 in words is "twenty-one trillion, three hundred thirty-two billion, two hundred twelve million, eleven thousand, three hundred ninety-one".