200121111202120 has 16 divisors (see below), whose sum is σ = 450272500204860. Its totient is φ = 80048444480832.

The previous prime is 200121111202099. The next prime is 200121111202163. The reversal of 200121111202120 is 21202111121002.

It can be written as a sum of positive squares in 2 ways, for example, as 175786602470116 + 24334508732004 = 13258454^2 + 4933002^2 .

It is a junction number, because it is equal to n+sod(n) for n = 200121111202094 and 200121111202103.

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, 2501513889987 + ... + 2501513890066.

Almost surely, 2^{200121111202120} is an apocalyptic number.

200121111202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121111202120 is an abundant number, since it is smaller than the sum of its proper divisors (250151389002740).

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

200121111202120 is a wasteful number, since it uses less digits than its factorization.

200121111202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003027780064 (or 5003027780060 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 200121111202120 its reverse (21202111121002), we get a palindrome (221323222323122).

The spelling of 200121111202120 in words is "two hundred trillion, one hundred twenty-one billion, one hundred eleven million, two hundred two thousand, one hundred twenty".