200021111121 has 64 divisors (see below), whose sum is σ = 315119185920. Its totient is φ = 111721559040.

The previous prime is 200021111113. The next prime is 200021111183. The reversal of 200021111121 is 121111120002.

It is not a de Polignac number, because 200021111121 - 2³ = 200021111113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200021111097 and 200021111106.

It is not an unprimeable number, because it can be changed into a prime (200021111021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2207806 + ... + 2296616.

It is an arithmetic number, because the mean of its divisors is an integer number (4923737280).

Almost surely, 2^200021111121 is an apocalyptic number.

It is an amenable number.

200021111121 is a deficient number, since it is larger than the sum of its proper divisors (115098074799).

200021111121 is a wasteful number, since it uses less digits than its factorization.

200021111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88966.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 200021111121 its reverse (121111120002), we get a palindrome (321132231123).

The spelling of 200021111121 in words is "two hundred billion, twenty-one million, one hundred eleven thousand, one hundred twenty-one".