1231202320320 has 112 divisors (see below), whose sum is σ = 4467505586688. Its totient is φ = 281417671680.

The previous prime is 1231202320259. The next prime is 1231202320349. The reversal of 1231202320320 is 230232021321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×1231202320320² (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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91600596 + ... + 91614035.

Almost surely, 2^{1231202320320} is an apocalyptic number.

1231202320320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231202320320 is an abundant number, since it is smaller than the sum of its proper divisors (3236303266368).

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

1231202320320 is a wasteful number, since it uses less digits than its factorization.

1231202320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183214658 (or 183214648 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1231202320320 its reverse (230232021321), we get a palindrome (1461434341641).

The spelling of 1231202320320 in words is "one trillion, two hundred thirty-one billion, two hundred two million, three hundred twenty thousand, three hundred twenty".