200021102121020 has 48 divisors (see below), whose sum is σ = 423669124287360. Its totient is φ = 79320621152256.

The previous prime is 200021102121019. The next prime is 200021102121059. The reversal of 200021102121020 is 20121201120002.

It is a junction number, because it is equal to n+sod(n) for n = 200021102120986 and 200021102121004.

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, 80661860 + ... + 83104619.

It is an arithmetic number, because the mean of its divisors is an integer number (8826440089320).

Almost surely, 2^{200021102121020} is an apocalyptic number.

200021102121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200021102121020 is an abundant number, since it is smaller than the sum of its proper divisors (223648022166340).

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

200021102121020 is a wasteful number, since it uses less digits than its factorization.

200021102121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163767014 (or 163767012 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 200021102121020 its reverse (20121201120002), we get a palindrome (220142303241022).

The spelling of 200021102121020 in words is "two hundred trillion, twenty-one billion, one hundred two million, one hundred twenty-one thousand, twenty".