21152010115451 has 2 divisors, whose sum is σ = 21152010115452. Its totient is φ = 21152010115450.

The previous prime is 21152010115417. The next prime is 21152010115589. The reversal of 21152010115451 is 15451101025112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21152010115451 - 2¹⁸ = 21152009853307 is a prime.

It is not a weakly prime, because it can be changed into another prime (21152010115151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576005057725 + 10576005057726.

It is an arithmetic number, because the mean of its divisors is an integer number (10576005057726).

Almost surely, 2^{21152010115451} is an apocalyptic number.

21152010115451 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152010115451 is an equidigital number, since it uses as much as digits as its factorization.

21152010115451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 29.

The spelling of 21152010115451 in words is "twenty-one trillion, one hundred fifty-two billion, ten million, one hundred fifteen thousand, four hundred fifty-one".