1231013105220 has 48 divisors (see below), whose sum is σ = 3462293399040. Its totient is φ = 326798094336.

The previous prime is 1231013105213. The next prime is 1231013105233. The reversal of 1231013105220 is 225013101321.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 45988605 + ... + 46015364.

It is an arithmetic number, because the mean of its divisors is an integer number (72131112480).

Almost surely, 2^{1231013105220} is an apocalyptic number.

1231013105220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231013105220 is an abundant number, since it is smaller than the sum of its proper divisors (2231280293820).

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

1231013105220 is a wasteful number, since it uses less digits than its factorization.

1231013105220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92004204 (or 92004202 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 1231013105220 its reverse (225013101321), we get a palindrome (1456026206541).

The spelling of 1231013105220 in words is "one trillion, two hundred thirty-one billion, thirteen million, one hundred five thousand, two hundred twenty".