11773701021 has 4 divisors (see below), whose sum is σ = 15698268032. Its totient is φ = 7849134012.

The previous prime is 11773701007. The next prime is 11773701047. The reversal of 11773701021 is 12010737711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11773701021 - 2¹⁵ = 11773668253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11773701021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11773701091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962283501 + ... + 1962283506.

It is an arithmetic number, because the mean of its divisors is an integer number (3924567008).

Almost surely, 2^11773701021 is an apocalyptic number.

It is an amenable number.

11773701021 is a deficient number, since it is larger than the sum of its proper divisors (3924567011).

11773701021 is an equidigital number, since it uses as much as digits as its factorization.

11773701021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924567010.

The product of its (nonzero) digits is 2058, while the sum is 30.

The spelling of 11773701021 in words is "eleven billion, seven hundred seventy-three million, seven hundred one thousand, twenty-one".