21010532371 has 2 divisors, whose sum is σ = 21010532372. Its totient is φ = 21010532370.

The previous prime is 21010532363. The next prime is 21010532381. The reversal of 21010532371 is 17323501012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010532371 - 2³ = 21010532363 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010532381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505266185 + 10505266186.

It is an arithmetic number, because the mean of its divisors is an integer number (10505266186).

Almost surely, 2^21010532371 is an apocalyptic number.

21010532371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010532371 is an equidigital number, since it uses as much as digits as its factorization.

21010532371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The spelling of 21010532371 in words is "twenty-one billion, ten million, five hundred thirty-two thousand, three hundred seventy-one".