21216403264151 has 2 divisors, whose sum is σ = 21216403264152. Its totient is φ = 21216403264150.

The previous prime is 21216403264079. The next prime is 21216403264183. The reversal of 21216403264151 is 15146230461212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21216403264151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21216403264751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10608201632075 + 10608201632076.

It is an arithmetic number, because the mean of its divisors is an integer number (10608201632076).

Almost surely, 2^{21216403264151} is an apocalyptic number.

21216403264151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21216403264151 is an equidigital number, since it uses as much as digits as its factorization.

21216403264151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 21216403264151 in words is "twenty-one trillion, two hundred sixteen billion, four hundred three million, two hundred sixty-four thousand, one hundred fifty-one".