21409015151 has 2 divisors, whose sum is σ = 21409015152. Its totient is φ = 21409015150.

The previous prime is 21409015099. The next prime is 21409015163. The reversal of 21409015151 is 15151090412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21409015151 - 2²² = 21404820847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21409015171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10704507575 + 10704507576.

It is an arithmetic number, because the mean of its divisors is an integer number (10704507576).

Almost surely, 2^21409015151 is an apocalyptic number.

21409015151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21409015151 is an equidigital number, since it uses as much as digits as its factorization.

21409015151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 29.

The spelling of 21409015151 in words is "twenty-one billion, four hundred nine million, fifteen thousand, one hundred fifty-one".