21221113022 has 16 divisors (see below), whose sum is σ = 34866333360. Its totient is φ = 9642046848.

The previous prime is 21221113019. The next prime is 21221113061. The reversal of 21221113022 is 22031112212.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 7 ways as a sum of consecutive naturals, for example, 10760228 + ... + 10762199.

It is an arithmetic number, because the mean of its divisors is an integer number (2179145835).

Almost surely, 2^21221113022 is an apocalyptic number.

21221113022 is a deficient number, since it is larger than the sum of its proper divisors (13645220338).

21221113022 is a wasteful number, since it uses less digits than its factorization.

21221113022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21522475.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21221113022 its reverse (22031112212), we get a palindrome (43252225234).

The spelling of 21221113022 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirteen thousand, twenty-two".