1321928706100 has 18 divisors (see below), whose sum is σ = 2868585292454. Its totient is φ = 528771482400.

The previous prime is 1321928706071. The next prime is 1321928706103. The reversal of 1321928706100 is 16078291231.

It can be written as a sum of positive squares in 3 ways, for example, as 462799926436 + 859128779664 = 680294^2 + 926892^2 .

It is a super-2 number, since 2×1321928706100² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321928706103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6609643431 + ... + 6609643630.

Almost surely, 2^{1321928706100} is an apocalyptic number.

1321928706100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321928706100 is an abundant number, since it is smaller than the sum of its proper divisors (1546656586354).

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

1321928706100 is a wasteful number, since it uses less digits than its factorization.

1321928706100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13219287075 (or 13219287068 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 1321928706100 in words is "one trillion, three hundred twenty-one billion, nine hundred twenty-eight million, seven hundred six thousand, one hundred".