200121223212 has 96 divisors (see below), whose sum is σ = 520591680000. Its totient is φ = 66481342272.

The previous prime is 200121223207. The next prime is 200121223217. The reversal of 200121223212 is 212322121002.

200121223212 is a `hidden beast` number, since 200 + 121 + 22 + 321 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (200121223207) and next prime (200121223217).

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

It is not an unprimeable number, because it can be changed into a prime (200121223217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46119339 + ... + 46123677.

It is an arithmetic number, because the mean of its divisors is an integer number (5422830000).

Almost surely, 2^200121223212 is an apocalyptic number.

It is an amenable number.

200121223212 is an abundant number, since it is smaller than the sum of its proper divisors (320470456788).

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

200121223212 is a wasteful number, since it uses less digits than its factorization.

200121223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700 (or 5692 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 200121223212 its reverse (212322121002), we get a palindrome (412443344214).

The spelling of 200121223212 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred twelve".