200320121992 has 16 divisors (see below), whose sum is σ = 375664841100. Its totient is φ = 100142831040.

The previous prime is 200320121971. The next prime is 200320122007. The reversal of 200320121992 is 299121023002.

It can be written as a sum of positive squares in 2 ways, for example, as 167881950756 + 32438171236 = 409734^2 + 180106^2 .

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, 2104267 + ... + 2197402.

Almost surely, 2^200320121992 is an apocalyptic number.

It is an amenable number.

200320121992 is a deficient number, since it is larger than the sum of its proper divisors (175344719108).

200320121992 is a wasteful number, since it uses less digits than its factorization.

200320121992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4307496 (or 4307492 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

Adding to 200320121992 its reverse (299121023002), we get a palindrome (499441144994).

The spelling of 200320121992 in words is "two hundred billion, three hundred twenty million, one hundred twenty-one thousand, nine hundred ninety-two".