20121111102200 has 96 divisors (see below), whose sum is σ = 47217092488560. Its totient is φ = 7973829734400.

The previous prime is 20121111102199. The next prime is 20121111102227. The reversal of 20121111102200 is 220111112102.

It is a super-2 number, since 2×20121111102200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9360680 + ... + 11307720.

Almost surely, 2^{20121111102200} is an apocalyptic number.

20121111102200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20121111102200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23608546244280).

20121111102200 is an abundant number, since it is smaller than the sum of its proper divisors (27095981386360).

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

20121111102200 is a wasteful number, since it uses less digits than its factorization.

20121111102200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947537 (or 1947528 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20121111102200 its reverse (220111112102), we get a palindrome (20341222214302).

The spelling of 20121111102200 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred two thousand, two hundred".