1321421343100 has 18 divisors (see below), whose sum is σ = 2867484314744. Its totient is φ = 528568537200.

The previous prime is 1321421343083. The next prime is 1321421343113. The reversal of 1321421343100 is 13431241231.

It is a super-2 number, since 2×1321421343100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6607106616 + ... + 6607106815.

Almost surely, 2^{1321421343100} is an apocalyptic number.

1321421343100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321421343100 is an abundant number, since it is smaller than the sum of its proper divisors (1546062971644).

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

1321421343100 is a wasteful number, since it uses less digits than its factorization.

1321421343100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13214213445 (or 13214213438 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1321421343100 its reverse (13431241231), we get a palindrome (1334852584331).

The spelling of 1321421343100 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, three hundred forty-three thousand, one hundred".