11218863621 has 8 divisors (see below), whose sum is σ = 17095411264. Its totient is φ = 6410779200.

The previous prime is 11218863613. The next prime is 11218863631. The reversal of 11218863621 is 12636881211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11218863621 - 2³ = 11218863613 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 11218863621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11218863631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267115780 + ... + 267115821.

It is an arithmetic number, because the mean of its divisors is an integer number (2136926408).

Almost surely, 2^11218863621 is an apocalyptic number.

It is an amenable number.

11218863621 is a deficient number, since it is larger than the sum of its proper divisors (5876547643).

11218863621 is an equidigital number, since it uses as much as digits as its factorization.

11218863621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534231611.

The product of its digits is 27648, while the sum is 39.

The spelling of 11218863621 in words is "eleven billion, two hundred eighteen million, eight hundred sixty-three thousand, six hundred twenty-one".