12122021112 has 64 divisors (see below), whose sum is σ = 31431348000. Its totient is φ = 3891224064.

The previous prime is 12122021069. The next prime is 12122021113. The reversal of 12122021112 is 21112022121.

It is a junction number, because it is equal to n+sod(n) for n = 12122021091 and 12122021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122021113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248358 + ... + 293130.

Almost surely, 2^12122021112 is an apocalyptic number.

12122021112 is a gapful number since it is divisible by the number (12) 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 12122021112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15715674000).

12122021112 is an abundant number, since it is smaller than the sum of its proper divisors (19309326888).

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

12122021112 is a wasteful number, since it uses less digits than its factorization.

12122021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45200 (or 45196 counting only the distinct ones).

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

Adding to 12122021112 its reverse (21112022121), we get a palindrome (33234043233).

The spelling of 12122021112 in words is "twelve billion, one hundred twenty-two million, twenty-one thousand, one hundred twelve".