1231130123420 has 24 divisors (see below), whose sum is σ = 2585394113904. Its totient is φ = 492448077056.

The previous prime is 1231130123407. The next prime is 1231130123441. The reversal of 1231130123420 is 243210311321.

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, 4656212 + ... + 4913508.

It is an arithmetic number, because the mean of its divisors is an integer number (107724754746).

Almost surely, 2^{1231130123420} is an apocalyptic number.

1231130123420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231130123420 is an abundant number, since it is smaller than the sum of its proper divisors (1354263990484).

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

1231130123420 is a wasteful number, since it uses less digits than its factorization.

1231130123420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496549 (or 496547 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1231130123420 its reverse (243210311321), we get a palindrome (1474340434741).

The spelling of 1231130123420 in words is "one trillion, two hundred thirty-one billion, one hundred thirty million, one hundred twenty-three thousand, four hundred twenty".