1213120311120 has 120 divisors (see below), whose sum is σ = 4116063258216. Its totient is φ = 320163692544.

The previous prime is 1213120311061. The next prime is 1213120311127. The reversal of 1213120311120 is 211130213121.

1213120311120 is a `hidden beast` number, since 1 + 21 + 312 + 0 + 311 + 1 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 223517146176 + 989603164944 = 472776^2 + 994788^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a junction number, because it is equal to n+sod(n) for n = 1213120311093 and 1213120311102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213120311127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8615157 + ... + 8754836.

Almost surely, 2^{1213120311120} is an apocalyptic number.

1213120311120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213120311120 is an abundant number, since it is smaller than the sum of its proper divisors (2902942947096).

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

1213120311120 is a wasteful number, since it uses less digits than its factorization.

1213120311120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17370109 (or 17370100 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1213120311120 its reverse (211130213121), we get a palindrome (1424250524241).

The spelling of 1213120311120 in words is "one trillion, two hundred thirteen billion, one hundred twenty million, three hundred eleven thousand, one hundred twenty".