200021100111 has 32 divisors (see below), whose sum is σ = 340065369600. Its totient is φ = 113823480960.

The previous prime is 200021100107. The next prime is 200021100161. The reversal of 200021100111 is 111001120002.

It is a happy number.

It is not a de Polignac number, because 200021100111 - 2² = 200021100107 is a prime.

It is a super-2 number, since 2×200021100111² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200021100093 and 200021100102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021100161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2150121 + ... + 2241218.

It is an arithmetic number, because the mean of its divisors is an integer number (10627042800).

Almost surely, 2^200021100111 is an apocalyptic number.

200021100111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

200021100111 is a deficient number, since it is larger than the sum of its proper divisors (140044269489).

200021100111 is a wasteful number, since it uses less digits than its factorization.

200021100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391596 (or 4391590 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 200021100111 its reverse (111001120002), we get a palindrome (311022220113).

The spelling of 200021100111 in words is "two hundred billion, twenty-one million, one hundred thousand, one hundred eleven".