20120112222100 has 36 divisors (see below), whose sum is σ = 47629792935648. Its totient is φ = 7316404444000.

The previous prime is 20120112222059. The next prime is 20120112222149. The reversal of 20120112222100 is 122221102102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9145504456 + ... + 9145506655.

It is an arithmetic number, because the mean of its divisors is an integer number (1323049803768).

Almost surely, 2^{20120112222100} is an apocalyptic number.

20120112222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120112222100 is an abundant number, since it is smaller than the sum of its proper divisors (27509680713548).

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

20120112222100 is a wasteful number, since it uses less digits than its factorization.

20120112222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18291011136 (or 18291011129 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20120112222100 its reverse (122221102102), we get a palindrome (20242333324202).

The spelling of 20120112222100 in words is "twenty trillion, one hundred twenty billion, one hundred twelve million, two hundred twenty-two thousand, one hundred".