921235980039 has 24 divisors (see below), whose sum is σ = 1306997731200. Its totient is φ = 577065101184.

The previous prime is 921235980031. The next prime is 921235980101. The reversal of 921235980039 is 930089532129.

It is not a de Polignac number, because 921235980039 - 2³ = 921235980031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 921235979973 and 921235980000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921235980031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367609 + ... + 1406274.

It is an arithmetic number, because the mean of its divisors is an integer number (54458238800).

Almost surely, 2^921235980039 is an apocalyptic number.

921235980039 is a deficient number, since it is larger than the sum of its proper divisors (385761751161).

921235980039 is a wasteful number, since it uses less digits than its factorization.

921235980039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774519 (or 1774502 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 51.

The spelling of 921235980039 in words is "nine hundred twenty-one billion, two hundred thirty-five million, nine hundred eighty thousand, thirty-nine".