200021020122 has 96 divisors (see below), whose sum is σ = 502856597376. Its totient is φ = 51919971840.

The previous prime is 200021020091. The next prime is 200021020123. The reversal of 200021020122 is 221020120002.

It is a junction number, because it is equal to n+sod(n) for n = 200021020098 and 200021020107.

It is not an unprimeable number, because it can be changed into a prime (200021020123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8408998 + ... + 8432750.

It is an arithmetic number, because the mean of its divisors is an integer number (5238089556).

Almost surely, 2^200021020122 is an apocalyptic number.

200021020122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 200021020122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251428298688).

200021020122 is an abundant number, since it is smaller than the sum of its proper divisors (302835577254).

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

200021020122 is a wasteful number, since it uses less digits than its factorization.

200021020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25444 (or 25433 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 200021020122 its reverse (221020120002), we get a palindrome (421041140124).

The spelling of 200021020122 in words is "two hundred billion, twenty-one million, twenty thousand, one hundred twenty-two".