200122001020 has 48 divisors (see below), whose sum is σ = 434239948800. Its totient is φ = 77390314560.

The previous prime is 200122001017. The next prime is 200122001069. The reversal of 200122001020 is 20100221002.

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

It is a junction number, because it is equal to n+sod(n) for n = 200122000988 and 200122001006.

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, 473401 + ... + 790159.

It is an arithmetic number, because the mean of its divisors is an integer number (9046665600).

Almost surely, 2^200122001020 is an apocalyptic number.

200122001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200122001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217119974400).

200122001020 is an abundant number, since it is smaller than the sum of its proper divisors (234117947780).

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

200122001020 is a wasteful number, since it uses less digits than its factorization.

200122001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317818 (or 317816 counting only the distinct ones).

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

Adding to 200122001020 its reverse (20100221002), we get a palindrome (220222222022).

The spelling of 200122001020 in words is "two hundred billion, one hundred twenty-two million, one thousand, twenty".