100421311321 has 4 divisors (see below), whose sum is σ = 100422979600. Its totient is φ = 100419643044.

The previous prime is 100421311283. The next prime is 100421311327. The reversal of 100421311321 is 123113124001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100421311321 - 2³⁵ = 66061572953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100421311327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740331 + ... + 865408.

It is an arithmetic number, because the mean of its divisors is an integer number (25105744900).

Almost surely, 2^100421311321 is an apocalyptic number.

It is an amenable number.

100421311321 is a deficient number, since it is larger than the sum of its proper divisors (1668279).

100421311321 is an equidigital number, since it uses as much as digits as its factorization.

100421311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668278.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 100421311321 its reverse (123113124001), we get a palindrome (223534435322).

The spelling of 100421311321 in words is "one hundred billion, four hundred twenty-one million, three hundred eleven thousand, three hundred twenty-one".