21133000751 has 2 divisors, whose sum is σ = 21133000752. Its totient is φ = 21133000750.

The previous prime is 21133000703. The next prime is 21133000813. The reversal of 21133000751 is 15700033112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21133000751 - 2³⁰ = 20059258927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21133000151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566500375 + 10566500376.

It is an arithmetic number, because the mean of its divisors is an integer number (10566500376).

Almost surely, 2^21133000751 is an apocalyptic number.

21133000751 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133000751 is an equidigital number, since it uses as much as digits as its factorization.

21133000751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

Adding to 21133000751 its reverse (15700033112), we get a palindrome (36833033863).

The spelling of 21133000751 in words is "twenty-one billion, one hundred thirty-three million, seven hundred fifty-one", and thus it is an aban number.