22000021221020 has 12 divisors (see below), whose sum is σ = 46200044564184. Its totient is φ = 8800008488400.

The previous prime is 22000021221011. The next prime is 22000021221043. The reversal of 22000021221020 is 2012212000022.

It is a junction number, because it is equal to n+sod(n) for n = 22000021220986 and 22000021221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550000530506 + ... + 550000530545.

It is an arithmetic number, because the mean of its divisors is an integer number (3850003713682).

Almost surely, 2^{22000021221020} is an apocalyptic number.

22000021221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22000021221020 is an abundant number, since it is smaller than the sum of its proper divisors (24200023343164).

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

22000021221020 is a wasteful number, since it uses less digits than its factorization.

22000021221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100001061060 (or 1100001061058 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22000021221020 its reverse (2012212000022), we get a palindrome (24012233221042).

The spelling of 22000021221020 in words is "twenty-two trillion, twenty-one million, two hundred twenty-one thousand, twenty".