21115350967 has 2 divisors, whose sum is σ = 21115350968. Its totient is φ = 21115350966.

The previous prime is 21115350961. The next prime is 21115351013. The reversal of 21115350967 is 76905351112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21115350967 - 2³¹ = 18967867319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21115350961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557675483 + 10557675484.

It is an arithmetic number, because the mean of its divisors is an integer number (10557675484).

Almost surely, 2^21115350967 is an apocalyptic number.

21115350967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21115350967 is an equidigital number, since it uses as much as digits as its factorization.

21115350967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 21115350967 in words is "twenty-one billion, one hundred fifteen million, three hundred fifty thousand, nine hundred sixty-seven".