21021031329607 has 2 divisors, whose sum is σ = 21021031329608. Its totient is φ = 21021031329606.

The previous prime is 21021031329593. The next prime is 21021031329653. The reversal of 21021031329607 is 70692313012012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021031329607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021031329307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510515664803 + 10510515664804.

It is an arithmetic number, because the mean of its divisors is an integer number (10510515664804).

Almost surely, 2^{21021031329607} is an apocalyptic number.

21021031329607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021031329607 is an equidigital number, since it uses as much as digits as its factorization.

21021031329607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 21021031329607 in words is "twenty-one trillion, twenty-one billion, thirty-one million, three hundred twenty-nine thousand, six hundred seven".