21097141007 has 2 divisors, whose sum is σ = 21097141008. Its totient is φ = 21097141006.

The previous prime is 21097140929. The next prime is 21097141057. The reversal of 21097141007 is 70014179012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21097141007 - 2²⁴ = 21080363791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21097141057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10548570503 + 10548570504.

It is an arithmetic number, because the mean of its divisors is an integer number (10548570504).

Almost surely, 2^21097141007 is an apocalyptic number.

21097141007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21097141007 is an equidigital number, since it uses as much as digits as its factorization.

21097141007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 32.

The spelling of 21097141007 in words is "twenty-one billion, ninety-seven million, one hundred forty-one thousand, seven".