21223021122 has 48 divisors (see below), whose sum is σ = 46472587200. Its totient is φ = 6999156000.

The previous prime is 21223021117. The next prime is 21223021151. The reversal of 21223021122 is 22112032212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21223021095 and 21223021104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3085347 + ... + 3092217.

It is an arithmetic number, because the mean of its divisors is an integer number (968178900).

Almost surely, 2^21223021122 is an apocalyptic number.

21223021122 is an abundant number, since it is smaller than the sum of its proper divisors (25249566078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21223021122 is a wasteful number, since it uses less digits than its factorization.

21223021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8679 (or 8676 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21223021122 its reverse (22112032212), we get a palindrome (43335053334).

The spelling of 21223021122 in words is "twenty-one billion, two hundred twenty-three million, twenty-one thousand, one hundred twenty-two".