22021121020 has 48 divisors (see below), whose sum is σ = 48987167040. Its totient is φ = 8286485504.

The previous prime is 22021120967. The next prime is 22021121047. The reversal of 22021121020 is 2012112022.

It is a happy number.

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, 787641 + ... + 815119.

It is an arithmetic number, because the mean of its divisors is an integer number (1020565980).

Almost surely, 2^22021121020 is an apocalyptic number.

22021121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021121020 is an abundant number, since it is smaller than the sum of its proper divisors (26966046020).

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

22021121020 is a wasteful number, since it uses less digits than its factorization.

22021121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29862 (or 29860 counting only the distinct ones).

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

Adding to 22021121020 its reverse (2012112022), we get a palindrome (24033233042).

The spelling of 22021121020 in words is "twenty-two billion, twenty-one million, one hundred twenty-one thousand, twenty".