21201020111039 has 2 divisors, whose sum is σ = 21201020111040. Its totient is φ = 21201020111038.

The previous prime is 21201020110999. The next prime is 21201020111123. The reversal of 21201020111039 is 93011102010212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201020111039 - 2¹⁶ = 21201020045503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201020111939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600510055519 + 10600510055520.

It is an arithmetic number, because the mean of its divisors is an integer number (10600510055520).

Almost surely, 2^{21201020111039} is an apocalyptic number.

21201020111039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201020111039 is an equidigital number, since it uses as much as digits as its factorization.

21201020111039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21201020111039 in words is "twenty-one trillion, two hundred one billion, twenty million, one hundred eleven thousand, thirty-nine".