1312111211232 has 48 divisors (see below), whose sum is σ = 3444904149120. Its totient is φ = 437292661632.

The previous prime is 1312111211227. The next prime is 1312111211233. The reversal of 1312111211232 is 2321121112131.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1312111211232² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1312111211199 and 1312111211208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312111211233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670558 + ... + 1753245.

It is an arithmetic number, because the mean of its divisors is an integer number (71768836440).

Almost surely, 2^{1312111211232} is an apocalyptic number.

1312111211232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312111211232 is an abundant number, since it is smaller than the sum of its proper divisors (2132792937888).

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

1312111211232 is a wasteful number, since it uses less digits than its factorization.

1312111211232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429455 (or 2429447 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

Adding to 1312111211232 its reverse (2321121112131), we get a palindrome (3633232323363).

The spelling of 1312111211232 in words is "one trillion, three hundred twelve billion, one hundred eleven million, two hundred eleven thousand, two hundred thirty-two".