200111212121100 has 72 divisors (see below), whose sum is σ = 661701074754048. Its totient is φ = 45739705627200.

The previous prime is 200111212121099. The next prime is 200111212121101. The reversal of 200111212121100 is 1121212111002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (200111212121099) and next prime (200111212121101).

It is a super-2 number, since 2×200111212121100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 200111212121100.

It is not an unprimeable number, because it can be changed into a prime (200111212121101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47645524596 + ... + 47645528795.

Almost surely, 2^{200111212121100} is an apocalyptic number.

200111212121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200111212121100 is an abundant number, since it is smaller than the sum of its proper divisors (461589862632948).

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

200111212121100 is a wasteful number, since it uses less digits than its factorization.

200111212121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95291053415 (or 95291053408 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 200111212121100 its reverse (1121212111002), we get a palindrome (201232424232102).

The spelling of 200111212121100 in words is "two hundred trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred".