22312203012 has 108 divisors (see below), whose sum is σ = 62543704860. Its totient is φ = 6701291520.

The previous prime is 22312203007. The next prime is 22312203013. The reversal of 22312203012 is 21030221322.

It can be written as a sum of positive squares in 2 ways, for example, as 5165871876 + 17146331136 = 71874^2 + 130944^2 .

It is a super-3 number, since 3×22312203012³ (a number of 32 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (22312203013) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 469564 + ... + 514892.

Almost surely, 2^22312203012 is an apocalyptic number.

22312203012 is a gapful number since it is divisible by the number (22) 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 22312203012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31271852430).

22312203012 is an abundant number, since it is smaller than the sum of its proper divisors (40231501848).

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

22312203012 is a wasteful number, since it uses less digits than its factorization.

22312203012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45474 (or 45458 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22312203012 its reverse (21030221322), we get a palindrome (43342424334).

The spelling of 22312203012 in words is "twenty-two billion, three hundred twelve million, two hundred three thousand, twelve".