1231101012320 has 96 divisors (see below), whose sum is σ = 2971052784000. Its totient is φ = 481850320896.

The previous prime is 1231101012313. The next prime is 1231101012377. The reversal of 1231101012320 is 232101011321.

It is a congruent number.

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, 36899006 + ... + 36932354.

It is an arithmetic number, because the mean of its divisors is an integer number (30948466500).

Almost surely, 2^{1231101012320} is an apocalyptic number.

1231101012320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231101012320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1485526392000).

1231101012320 is an abundant number, since it is smaller than the sum of its proper divisors (1739951771680).

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

1231101012320 is a wasteful number, since it uses less digits than its factorization.

1231101012320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38320 (or 38312 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1231101012320 its reverse (232101011321), we get a palindrome (1463202023641).

Subtracting from 1231101012320 its reverse (232101011321), we obtain a palindrome (999000000999).

The spelling of 1231101012320 in words is "one trillion, two hundred thirty-one billion, one hundred one million, twelve thousand, three hundred twenty".