1320221323100 has 36 divisors (see below), whose sum is σ = 2867708605944. Its totient is φ = 527567177280.

The previous prime is 1320221323087. The next prime is 1320221323151. The reversal of 1320221323100 is 13231220231.

It is a super-2 number, since 2×1320221323100² (a number of 25 digits) contains 22 as substring.

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

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, 6415094 + ... + 6617693.

Almost surely, 2^{1320221323100} is an apocalyptic number.

1320221323100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320221323100 is an abundant number, since it is smaller than the sum of its proper divisors (1547487282844).

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

1320221323100 is a wasteful number, since it uses less digits than its factorization.

1320221323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13033814 (or 13033807 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1320221323100 its reverse (13231220231), we get a palindrome (1333452543331).

The spelling of 1320221323100 in words is "one trillion, three hundred twenty billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred".