200121221012111 has 16 divisors (see below), whose sum is σ = 232838014503744. Its totient is φ = 168456609045504.

The previous prime is 200121221012107. The next prime is 200121221012113. The reversal of 200121221012111 is 111210122121002.

It is a cyclic number.

It is not a de Polignac number, because 200121221012111 - 2² = 200121221012107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200121221012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121221012113) 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, 840281486 + ... + 840519611.

It is an arithmetic number, because the mean of its divisors is an integer number (14552375906484).

Almost surely, 2^{200121221012111} is an apocalyptic number.

200121221012111 is a deficient number, since it is larger than the sum of its proper divisors (32716793491633).

200121221012111 is a wasteful number, since it uses less digits than its factorization.

200121221012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680801410.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 200121221012111 its reverse (111210122121002), we get a palindrome (311331343133113).

The spelling of 200121221012111 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty-one million, twelve thousand, one hundred eleven".