21029130007 has 2 divisors, whose sum is σ = 21029130008. Its totient is φ = 21029130006.

The previous prime is 21029129983. The next prime is 21029130043. The reversal of 21029130007 is 70003192012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21029130007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21029130107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10514565003 + 10514565004.

It is an arithmetic number, because the mean of its divisors is an integer number (10514565004).

Almost surely, 2^21029130007 is an apocalyptic number.

21029130007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21029130007 is an equidigital number, since it uses as much as digits as its factorization.

21029130007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 21029130007 in words is "twenty-one billion, twenty-nine million, one hundred thirty thousand, seven".