21021122119 has 4 divisors (see below), whose sum is σ = 21023463960. Its totient is φ = 21018780280.

The previous prime is 21021122071. The next prime is 21021122137. The reversal of 21021122119 is 91122112012.

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

It is a cyclic number.

It is not a de Polignac number, because 21021122119 - 2²⁵ = 20987567687 is a prime.

It is a super-2 number, since 2×21021122119² (a number of 21 digits) contains 22 as substring.

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 21021122119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021122179) 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, 1157404 + ... + 1175425.

It is an arithmetic number, because the mean of its divisors is an integer number (5255865990).

Almost surely, 2^21021122119 is an apocalyptic number.

21021122119 is a deficient number, since it is larger than the sum of its proper divisors (2341841).

21021122119 is an equidigital number, since it uses as much as digits as its factorization.

21021122119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341840.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21021122119 in words is "twenty-one billion, twenty-one million, one hundred twenty-two thousand, one hundred nineteen".