200111121100021 has 16 divisors (see below), whose sum is σ = 200718508032000. Its totient is φ = 199504775964208.

The previous prime is 200111121100019. The next prime is 200111121100069. The reversal of 200111121100021 is 120001121111002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 200111121100021 - 2¹ = 200111121100019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200111121099974 and 200111121100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111121100081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1905350316 + ... + 1905455338.

It is an arithmetic number, because the mean of its divisors is an integer number (12544906752000).

Almost surely, 2^{200111121100021} is an apocalyptic number.

It is an amenable number.

200111121100021 is a deficient number, since it is larger than the sum of its proper divisors (607386931979).

200111121100021 is a wasteful number, since it uses less digits than its factorization.

200111121100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109928.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 200111121100021 its reverse (120001121111002), we get a palindrome (320112242211023).

The spelling of 200111121100021 in words is "two hundred trillion, one hundred eleven billion, one hundred twenty-one million, one hundred thousand, twenty-one".