1320121311100 has 36 divisors (see below), whose sum is σ = 2876957987904. Its totient is φ = 525782212480.

The previous prime is 1320121311053. The next prime is 1320121311161. The reversal of 1320121311100 is 11131210231.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28305484 + ... + 28352083.

It is an arithmetic number, because the mean of its divisors is an integer number (79915499664).

Almost surely, 2^{1320121311100} is an apocalyptic number.

1320121311100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320121311100 is an abundant number, since it is smaller than the sum of its proper divisors (1556836676804).

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

1320121311100 is a wasteful number, since it uses less digits than its factorization.

1320121311100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56657814 (or 56657807 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1320121311100 its reverse (11131210231), we get a palindrome (1331252521331).

The spelling of 1320121311100 in words is "one trillion, three hundred twenty billion, one hundred twenty-one million, three hundred eleven thousand, one hundred".