20121012111222 has 64 divisors (see below), whose sum is σ = 48780608832000. Its totient is φ = 6096976691040.

The previous prime is 20121012111209. The next prime is 20121012111247. The reversal of 20121012111222 is 22211121012102.

20121012111222 is a `hidden beast` number, since 20 + 1 + 210 + 1 + 211 + 1 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20121012111195 and 20121012111204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11413588 + ... + 13058024.

It is an arithmetic number, because the mean of its divisors is an integer number (762197013000).

Almost surely, 2^{20121012111222} is an apocalyptic number.

20121012111222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121012111222 is an abundant number, since it is smaller than the sum of its proper divisors (28659596720778).

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

20121012111222 is a wasteful number, since it uses less digits than its factorization.

20121012111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665058 (or 1665052 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20121012111222 its reverse (22211121012102), we get a palindrome (42332133123324).

The spelling of 20121012111222 in words is "twenty trillion, one hundred twenty-one billion, twelve million, one hundred eleven thousand, two hundred twenty-two".