21111888022 has 8 divisors (see below), whose sum is σ = 33530645736. Its totient is φ = 9935006112.

The previous prime is 21111888011. The next prime is 21111888041. The reversal of 21111888022 is 22088811112.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 620937883 = 21111888022 / (2 + 1 + 1 + 1 + 1 + 8 + 8 + 8 + 0 + 2 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310468908 + ... + 310468975.

It is an arithmetic number, because the mean of its divisors is an integer number (4191330717).

Almost surely, 2^21111888022 is an apocalyptic number.

21111888022 is a deficient number, since it is larger than the sum of its proper divisors (12418757714).

21111888022 is a wasteful number, since it uses less digits than its factorization.

21111888022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620937902.

The product of its (nonzero) digits is 4096, while the sum is 34.

The spelling of 21111888022 in words is "twenty-one billion, one hundred eleven million, eight hundred eighty-eight thousand, twenty-two".