21200102012039 has 2 divisors, whose sum is σ = 21200102012040. Its totient is φ = 21200102012038.

The previous prime is 21200102011999. The next prime is 21200102012053. The reversal of 21200102012039 is 93021020100212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21200102012039 - 2³² = 21195807044743 is a prime.

It is a super-2 number, since 2×21200102012039² (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 (21200102012069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600051006019 + 10600051006020.

It is an arithmetic number, because the mean of its divisors is an integer number (10600051006020).

Almost surely, 2^{21200102012039} is an apocalyptic number.

21200102012039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200102012039 is an equidigital number, since it uses as much as digits as its factorization.

21200102012039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 21200102012039 in words is "twenty-one trillion, two hundred billion, one hundred two million, twelve thousand, thirty-nine".