200121012112 has 160 divisors (see below), whose sum is σ = 478067616000. Its totient is φ = 80893596672.

The previous prime is 200121012101. The next prime is 200121012149. The reversal of 200121012112 is 211210121002.

It is a junction number, because it is equal to n+sod(n) for n = 200121012092 and 200121012101.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24291258 + ... + 24299494.

It is an arithmetic number, because the mean of its divisors is an integer number (2987922600).

Almost surely, 2^200121012112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200121012112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239033808000).

200121012112 is an abundant number, since it is smaller than the sum of its proper divisors (277946603888).

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

200121012112 is a wasteful number, since it uses less digits than its factorization.

200121012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8518 (or 8498 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200121012112 its reverse (211210121002), we get a palindrome (411331133114).

The spelling of 200121012112 in words is "two hundred billion, one hundred twenty-one million, twelve thousand, one hundred twelve".