1312111211120 has 80 divisors (see below), whose sum is σ = 3082334592960. Its totient is φ = 519422318592.

The previous prime is 1312111211119. The next prime is 1312111211129. The reversal of 1312111211120 is 211121112131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312111211129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2845004 + ... + 3273876.

It is an arithmetic number, because the mean of its divisors is an integer number (38529182412).

Almost surely, 2^{1312111211120} is an apocalyptic number.

1312111211120 is a gapful number since it is divisible by the number (10) 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 1312111211120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1541167296480).

1312111211120 is an abundant number, since it is smaller than the sum of its proper divisors (1770223381840).

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

1312111211120 is a wasteful number, since it uses less digits than its factorization.

1312111211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429282 (or 429276 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1312111211120 its reverse (211121112131), we get a palindrome (1523232323251).

It can be divided in two parts, 13121112111 and 20, that added together give a palindrome (13121112131).

The spelling of 1312111211120 in words is "one trillion, three hundred twelve billion, one hundred eleven million, two hundred eleven thousand, one hundred twenty".