12102121122 has 128 divisors (see below), whose sum is σ = 30116136960. Its totient is φ = 3157056000.

The previous prime is 12102121099. The next prime is 12102121127. The reversal of 12102121122 is 22112120121.

It is a super-2 number, since 2×12102121122² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12102121127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31931529 + ... + 31931907.

It is an arithmetic number, because the mean of its divisors is an integer number (235282320).

Almost surely, 2^12102121122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12102121122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15058068480).

12102121122 is an abundant number, since it is smaller than the sum of its proper divisors (18014015838).

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

12102121122 is a wasteful number, since it uses less digits than its factorization.

12102121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12102121122 its reverse (22112120121), we get a palindrome (34214241243).

The spelling of 12102121122 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, one hundred twenty-two".