20021200870907 has 2 divisors, whose sum is σ = 20021200870908. Its totient is φ = 20021200870906.

The previous prime is 20021200870877. The next prime is 20021200870927. The reversal of 20021200870907 is 70907800212002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021200870907 - 2¹⁸ = 20021200608763 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021200870927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010600435453 + 10010600435454.

It is an arithmetic number, because the mean of its divisors is an integer number (10010600435454).

Almost surely, 2^{20021200870907} is an apocalyptic number.

20021200870907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021200870907 is an equidigital number, since it uses as much as digits as its factorization.

20021200870907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 20021200870907 in words is "twenty trillion, twenty-one billion, two hundred million, eight hundred seventy thousand, nine hundred seven".