1312120123230 has 128 divisors (see below), whose sum is σ = 3790533500928. Its totient is φ = 284192295552.

The previous prime is 1312120123211. The next prime is 1312120123231. The reversal of 1312120123230 is 323210212131.

It is a super-2 number, since 2×1312120123230² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1312120123197 and 1312120123206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312120123231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 752632 + ... + 1786251.

It is an arithmetic number, because the mean of its divisors is an integer number (29613542976).

Almost surely, 2^{1312120123230} is an apocalyptic number.

1312120123230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312120123230 is an abundant number, since it is smaller than the sum of its proper divisors (2478413377698).

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

1312120123230 is a wasteful number, since it uses less digits than its factorization.

1312120123230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539030.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1312120123230 its reverse (323210212131), we get a palindrome (1635330335361).

The spelling of 1312120123230 in words is "one trillion, three hundred twelve billion, one hundred twenty million, one hundred twenty-three thousand, two hundred thirty".