200212112121 has 16 divisors (see below), whose sum is σ = 308230333824. Its totient is φ = 113227467264.

The previous prime is 200212112117. The next prime is 200212112159. The reversal of 200212112121 is 121211212002.

It is not a de Polignac number, because 200212112121 - 2² = 200212112117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200212112121.

It is not an unprimeable number, because it can be changed into a prime (200212112101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49141830 + ... + 49145903.

It is an arithmetic number, because the mean of its divisors is an integer number (19264395864).

Almost surely, 2^200212112121 is an apocalyptic number.

200212112121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

200212112121 is a deficient number, since it is larger than the sum of its proper divisors (108018221703).

200212112121 is an equidigital number, since it uses as much as digits as its factorization.

200212112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98287840.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 200212112121 its reverse (121211212002), we get a palindrome (321423324123).

The spelling of 200212112121 in words is "two hundred billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-one".