21120021022 has 32 divisors (see below), whose sum is σ = 32427980640. Its totient is φ = 10313272320.

The previous prime is 21120020993. The next prime is 21120021029. The reversal of 21120021022 is 22012002112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120020993 and 21120021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120021029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19251978 + ... + 19253074.

It is an arithmetic number, because the mean of its divisors is an integer number (1013374395).

Almost surely, 2^21120021022 is an apocalyptic number.

21120021022 is a deficient number, since it is larger than the sum of its proper divisors (11307959618).

21120021022 is a wasteful number, since it uses less digits than its factorization.

21120021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21120021022 its reverse (22012002112), we get a palindrome (43132023134).

The spelling of 21120021022 in words is "twenty-one billion, one hundred twenty million, twenty-one thousand, twenty-two".