1231410013220 has 24 divisors (see below), whose sum is σ = 2589080436600. Its totient is φ = 491969832192.

The previous prime is 1231410013187. The next prime is 1231410013231. The reversal of 1231410013220 is 223100141321.

It can be written as a sum of positive squares in 4 ways, for example, as 17407108096 + 1214002905124 = 131936^2 + 1101818^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1231410013192 and 1231410013201.

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, 37118825 + ... + 37151984.

It is an arithmetic number, because the mean of its divisors is an integer number (107878351525).

Almost surely, 2^{1231410013220} is an apocalyptic number.

1231410013220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231410013220 is an abundant number, since it is smaller than the sum of its proper divisors (1357670423380).

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

1231410013220 is a wasteful number, since it uses less digits than its factorization.

1231410013220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74271647 (or 74271645 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1231410013220 its reverse (223100141321), we get a palindrome (1454510154541).

The spelling of 1231410013220 in words is "one trillion, two hundred thirty-one billion, four hundred ten million, thirteen thousand, two hundred twenty".