200121222222 has 48 divisors (see below), whose sum is σ = 435397979952. Its totient is φ = 66430108800.

The previous prime is 200121222209. The next prime is 200121222263. The reversal of 200121222222 is 222222121002.

200121222222 is a `hidden beast` number, since 200 + 1 + 21 + 222 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 200121222195 and 200121222204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10096722 + ... + 10116522.

It is an arithmetic number, because the mean of its divisors is an integer number (9070791249).

Almost surely, 2^200121222222 is an apocalyptic number.

200121222222 is an abundant number, since it is smaller than the sum of its proper divisors (235276757730).

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

200121222222 is a wasteful number, since it uses less digits than its factorization.

200121222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22113 (or 22110 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 200121222222 its reverse (222222121002), we get a palindrome (422343343224).

The spelling of 200121222222 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".