21202130200079 has 2 divisors, whose sum is σ = 21202130200080. Its totient is φ = 21202130200078.

The previous prime is 21202130200019. The next prime is 21202130200127. The reversal of 21202130200079 is 97000203120212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202130200079 is a prime.

It is a super-2 number, since 2×21202130200079² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202130200019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601065100039 + 10601065100040.

It is an arithmetic number, because the mean of its divisors is an integer number (10601065100040).

Almost surely, 2^{21202130200079} is an apocalyptic number.

21202130200079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202130200079 is an equidigital number, since it uses as much as digits as its factorization.

21202130200079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The spelling of 21202130200079 in words is "twenty-one trillion, two hundred two billion, one hundred thirty million, two hundred thousand, seventy-nine".