12311012211220 has 24 divisors (see below), whose sum is σ = 25855148958408. Its totient is φ = 4924019491200.

The previous prime is 12311012211217. The next prime is 12311012211241. The reversal of 12311012211220 is 2211221011321.

It can be written as a sum of positive squares in 4 ways, for example, as 478595541636 + 11832416669584 = 691806^2 + 3439828^2 .

It is a super-2 number, since 2×12311012211220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23825071 + ... + 24336310.

It is an arithmetic number, because the mean of its divisors is an integer number (1077297873267).

Almost surely, 2^{12311012211220} is an apocalyptic number.

12311012211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311012211220 is an abundant number, since it is smaller than the sum of its proper divisors (13544136747188).

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

12311012211220 is a wasteful number, since it uses less digits than its factorization.

12311012211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48174171 (or 48174169 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12311012211220 its reverse (2211221011321), we get a palindrome (14522233222541).

The spelling of 12311012211220 in words is "twelve trillion, three hundred eleven billion, twelve million, two hundred eleven thousand, two hundred twenty".