21012285444107 has 2 divisors, whose sum is σ = 21012285444108. Its totient is φ = 21012285444106.

The previous prime is 21012285444083. The next prime is 21012285444151. The reversal of 21012285444107 is 70144458221012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21012285444107 - 2²⁶ = 21012218335243 is a prime.

It is a super-2 number, since 2×21012285444107² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21012285444197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506142722053 + 10506142722054.

It is an arithmetic number, because the mean of its divisors is an integer number (10506142722054).

Almost surely, 2^{21012285444107} is an apocalyptic number.

21012285444107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012285444107 is an equidigital number, since it uses as much as digits as its factorization.

21012285444107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 143360, while the sum is 41.

The spelling of 21012285444107 in words is "twenty-one trillion, twelve billion, two hundred eighty-five million, four hundred forty-four thousand, one hundred seven".