1321299406600 has 48 divisors (see below), whose sum is σ = 3084874876800. Its totient is φ = 526308363840.

The previous prime is 1321299406507. The next prime is 1321299406667. The reversal of 1321299406600 is 66049921231.

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, 13773324 + ... + 13868923.

It is an arithmetic number, because the mean of its divisors is an integer number (64268226600).

Almost surely, 2^{1321299406600} is an apocalyptic number.

1321299406600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321299406600 is an abundant number, since it is smaller than the sum of its proper divisors (1763575470200).

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

1321299406600 is a wasteful number, since it uses less digits than its factorization.

1321299406600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27642502 (or 27642493 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 1321299406600 in words is "one trillion, three hundred twenty-one billion, two hundred ninety-nine million, four hundred six thousand, six hundred".