20220121000 has 32 divisors (see below), whose sum is σ = 47315085480. Its totient is φ = 8088048000.

The previous prime is 20220120989. The next prime is 20220121073. The reversal of 20220121000 is 12102202.

It can be written as a sum of positive squares in 4 ways, for example, as 4451291524 + 15768829476 = 66718^2 + 125574^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10109061 + ... + 10111060.

Almost surely, 2^20220121000 is an apocalyptic number.

20220121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220121000 is an abundant number, since it is smaller than the sum of its proper divisors (27094964480).

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

20220121000 is a wasteful number, since it uses less digits than its factorization.

20220121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20220142 (or 20220128 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20220121000 its reverse (12102202), we get a palindrome (20232223202).

The spelling of 20220121000 in words is "twenty billion, two hundred twenty million, one hundred twenty-one thousand".