12221123310 has 192 divisors, whose sum is σ = 36433013760. Its totient is φ = 2815223040.

The previous prime is 12221123269. The next prime is 12221123329. The reversal of 12221123310 is 1332112221.

12221123310 is a `hidden beast` number, since 1 + 222 + 112 + 331 + 0 = 666.

It is a super-2 number, since 2×12221123310² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1571211 + ... + 1578969.

It is an arithmetic number, because the mean of its divisors is an integer number (189755280).

Almost surely, 2^12221123310 is an apocalyptic number.

12221123310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221123310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18216506880).

12221123310 is an abundant number, since it is smaller than the sum of its proper divisors (24211890450).

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

12221123310 is a wasteful number, since it uses less digits than its factorization.

12221123310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863 (or 7860 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12221123310 its reverse (1332112221), we get a palindrome (13553235531).

It can be divided in two parts, 12221 and 123310, that added together give a palindrome (135531).

The spelling of 12221123310 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-three thousand, three hundred ten".