113121321222 has 256 divisors, whose sum is σ = 315987775488. Its totient is φ = 26130677760.

The previous prime is 113121321221. The next prime is 113121321223. The reversal of 113121321222 is 222123121311.

It is an interprime number because it is at equal distance from previous prime (113121321221) and next prime (113121321223).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121321221) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7891822 + ... + 7906142.

It is an arithmetic number, because the mean of its divisors is an integer number (1234327248).

Almost surely, 2^113121321222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113121321222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157993887744).

113121321222 is an abundant number, since it is smaller than the sum of its proper divisors (202866454266).

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

113121321222 is a wasteful number, since it uses less digits than its factorization.

113121321222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14423.

The product of its digits is 288, while the sum is 21.

Adding to 113121321222 its reverse (222123121311), we get a palindrome (335244442533).

The spelling of 113121321222 in words is "one hundred thirteen billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred twenty-two".