21911496151 has 2 divisors, whose sum is σ = 21911496152. Its totient is φ = 21911496150.

The previous prime is 21911496143. The next prime is 21911496223. The reversal of 21911496151 is 15169411912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21911496151 - 2³ = 21911496143 is a prime.

It is a super-2 number, since 2×21911496151² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21911496121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10955748075 + 10955748076.

It is an arithmetic number, because the mean of its divisors is an integer number (10955748076).

Almost surely, 2^21911496151 is an apocalyptic number.

21911496151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21911496151 is an equidigital number, since it uses as much as digits as its factorization.

21911496151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 40.

The spelling of 21911496151 in words is "twenty-one billion, nine hundred eleven million, four hundred ninety-six thousand, one hundred fifty-one".