200121222020 has 12 divisors (see below), whose sum is σ = 420254566284. Its totient is φ = 80048488800.

The previous prime is 200121222017. The next prime is 200121222079. The reversal of 200121222020 is 20222121002.

It can be written as a sum of positive squares in 2 ways, for example, as 106107850564 + 94013371456 = 325742^2 + 306616^2 .

It is a junction number, because it is equal to n+sod(n) for n = 200121221986 and 200121222004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5003030531 + ... + 5003030570.

It is an arithmetic number, because the mean of its divisors is an integer number (35021213857).

Almost surely, 2^200121222020 is an apocalyptic number.

200121222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121222020 is an abundant number, since it is smaller than the sum of its proper divisors (220133344264).

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

200121222020 is a wasteful number, since it uses less digits than its factorization.

200121222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006061110 (or 10006061108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 200121222020 its reverse (20222121002), we get a palindrome (220343343022).

The spelling of 200121222020 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty".