21120020102039 has 2 divisors, whose sum is σ = 21120020102040. Its totient is φ = 21120020102038.

The previous prime is 21120020101997. The next prime is 21120020102113. The reversal of 21120020102039 is 93020102002112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120020102039 - 2¹⁶ = 21120020036503 is a prime.

It is a super-3 number, since 3×21120020102039³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120020102539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560010051019 + 10560010051020.

It is an arithmetic number, because the mean of its divisors is an integer number (10560010051020).

Almost surely, 2^{21120020102039} is an apocalyptic number.

21120020102039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120020102039 is an equidigital number, since it uses as much as digits as its factorization.

21120020102039 is an evil number, because the sum of its binary digits is even.

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

The spelling of 21120020102039 in words is "twenty-one trillion, one hundred twenty billion, twenty million, one hundred two thousand, thirty-nine".