20221120021000 has 32 divisors (see below), whose sum is σ = 47317420851480. Its totient is φ = 8088448008000.

The previous prime is 20221120020989. The next prime is 20221120021001. The reversal of 20221120021000 is 12002112202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4686281107524 + 15534838913476 = 2164782^2 + 3941426^2 .

It is not an unprimeable number, because it can be changed into a prime (20221120021001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10110559011 + ... + 10110561010.

Almost surely, 2^{20221120021000} is an apocalyptic number.

20221120021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221120021000 is an abundant number, since it is smaller than the sum of its proper divisors (27096300830480).

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

20221120021000 is a wasteful number, since it uses less digits than its factorization.

20221120021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20221120042 (or 20221120028 counting only the distinct ones).

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

Adding to 20221120021000 its reverse (12002112202), we get a palindrome (20233122133202).

The spelling of 20221120021000 in words is "twenty trillion, two hundred twenty-one billion, one hundred twenty million, twenty-one thousand".