1331320231100 has 72 divisors (see below), whose sum is σ = 2898828213120. Its totient is φ = 530711858880.

The previous prime is 1331320231097. The next prime is 1331320231103. The reversal of 1331320231100 is 11320231331.

It is an interprime number because it is at equal distance from previous prime (1331320231097) and next prime (1331320231103).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331320231103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61844939 + ... + 61866461.

It is an arithmetic number, because the mean of its divisors is an integer number (40261502960).

Almost surely, 2^{1331320231100} is an apocalyptic number.

1331320231100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331320231100 is an abundant number, since it is smaller than the sum of its proper divisors (1567507982020).

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

1331320231100 is a wasteful number, since it uses less digits than its factorization.

1331320231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23619 (or 23612 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1331320231100 its reverse (11320231331), we get a palindrome (1342640462431).

The spelling of 1331320231100 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, two hundred thirty-one thousand, one hundred".