11031621421 has 4 divisors (see below), whose sum is σ = 11033100000. Its totient is φ = 11030142844.

The previous prime is 11031621401. The next prime is 11031621427. The reversal of 11031621421 is 12412613011.

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 a cyclic number.

It is not a de Polignac number, because 11031621421 - 2⁵ = 11031621389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11031621392 and 11031621401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031621427) 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, 728041 + ... + 743038.

It is an arithmetic number, because the mean of its divisors is an integer number (2758275000).

Almost surely, 2^11031621421 is an apocalyptic number.

It is an amenable number.

11031621421 is a deficient number, since it is larger than the sum of its proper divisors (1478579).

11031621421 is an equidigital number, since it uses as much as digits as its factorization.

11031621421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478578.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 11031621421 in words is "eleven billion, thirty-one million, six hundred twenty-one thousand, four hundred twenty-one".