20121100122 has 16 divisors (see below), whose sum is σ = 40409183232. Its totient is φ = 6679202880.

The previous prime is 20121100117. The next prime is 20121100151. The reversal of 20121100122 is 22100112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121100098 and 20121100107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6956058 + ... + 6958949.

It is an arithmetic number, because the mean of its divisors is an integer number (2525573952).

Almost surely, 2^20121100122 is an apocalyptic number.

20121100122 is an abundant number, since it is smaller than the sum of its proper divisors (20288083110).

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

20121100122 is a wasteful number, since it uses less digits than its factorization.

20121100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13915253.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20121100122 its reverse (22100112102), we get a palindrome (42221212224).

The spelling of 20121100122 in words is "twenty billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-two".