11013773621 has 4 divisors (see below), whose sum is σ = 11014001292. Its totient is φ = 11013545952.

The previous prime is 11013773581. The next prime is 11013773689. The reversal of 11013773621 is 12637731011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9034502500 + 1979271121 = 95050^2 + 44489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11013773621 - 2⁶ = 11013773557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11013773521) 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, 9230 + ... + 148703.

It is an arithmetic number, because the mean of its divisors is an integer number (2753500323).

Almost surely, 2^11013773621 is an apocalyptic number.

It is an amenable number.

11013773621 is a deficient number, since it is larger than the sum of its proper divisors (227671).

11013773621 is an equidigital number, since it uses as much as digits as its factorization.

11013773621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227670.

The product of its (nonzero) digits is 5292, while the sum is 32.

The spelling of 11013773621 in words is "eleven billion, thirteen million, seven hundred seventy-three thousand, six hundred twenty-one".