1231231002120 has 192 divisors, whose sum is σ = 4637554871040. Its totient is φ = 277460467200.

The previous prime is 1231231002101. The next prime is 1231231002217. The reversal of 1231231002120 is 212001321321.

1231231002120 is a `hidden beast` number, since 1 + 2 + 312 + 310 + 0 + 21 + 20 = 666.

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 = 1231231002093 and 1231231002102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3261811 + ... + 3619650.

It is an arithmetic number, because the mean of its divisors is an integer number (24153931620).

Almost surely, 2^{1231231002120} is an apocalyptic number.

1231231002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231231002120 is an abundant number, since it is smaller than the sum of its proper divisors (3406323868920).

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

1231231002120 is a wasteful number, since it uses less digits than its factorization.

1231231002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6881556 (or 6881549 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1231231002120 its reverse (212001321321), we get a palindrome (1443232323441).

The spelling of 1231231002120 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-one million, two thousand, one hundred twenty".