20200021121000 has 96 divisors (see below), whose sum is σ = 54985282115400. Its totient is φ = 6925721510400.

The previous prime is 20200021120997. The next prime is 20200021121003. The reversal of 20200021121000 is 12112000202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20200021120997) and next prime (20200021121003).

It can be written as a sum of positive squares in 4 ways, for example, as 705341303716 + 19494679817284 = 839846^2 + 4415278^2 .

It is not an unprimeable number, because it can be changed into a prime (20200021121003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206073665 + ... + 206171664.

Almost surely, 2^{20200021121000} is an apocalyptic number.

20200021121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200021121000 is an abundant number, since it is smaller than the sum of its proper divisors (34785260994400).

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

20200021121000 is a wasteful number, since it uses less digits than its factorization.

20200021121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412245364 (or 412245343 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20200021121000 its reverse (12112000202), we get a palindrome (20212133121202).

The spelling of 20200021121000 in words is "twenty trillion, two hundred billion, twenty-one million, one hundred twenty-one thousand".