21140023222 has 32 divisors (see below), whose sum is σ = 33244243200. Its totient is φ = 10069321248.

The previous prime is 21140023199. The next prime is 21140023231. The reversal of 21140023222 is 22232004112.

It is a super-2 number, since 2×21140023222² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21140023222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1306063 + ... + 1322149.

It is an arithmetic number, because the mean of its divisors is an integer number (1038882600).

Almost surely, 2^21140023222 is an apocalyptic number.

21140023222 is a deficient number, since it is larger than the sum of its proper divisors (12104219978).

21140023222 is a wasteful number, since it uses less digits than its factorization.

21140023222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16420.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21140023222 its reverse (22232004112), we get a palindrome (43372027334).

The spelling of 21140023222 in words is "twenty-one billion, one hundred forty million, twenty-three thousand, two hundred twenty-two".