21224502111 has 4 divisors (see below), whose sum is σ = 28299336152. Its totient is φ = 14149668072.

The previous prime is 21224502073. The next prime is 21224502137. The reversal of 21224502111 is 11120542212.

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

It is not a de Polignac number, because 21224502111 - 2¹⁴ = 21224485727 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 (21224502161) 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, 3537417016 + ... + 3537417021.

It is an arithmetic number, because the mean of its divisors is an integer number (7074834038).

Almost surely, 2^21224502111 is an apocalyptic number.

21224502111 is a deficient number, since it is larger than the sum of its proper divisors (7074834041).

21224502111 is an equidigital number, since it uses as much as digits as its factorization.

21224502111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074834040.

The product of its (nonzero) digits is 320, while the sum is 21.

The spelling of 21224502111 in words is "twenty-one billion, two hundred twenty-four million, five hundred two thousand, one hundred eleven".