100421025613 has 4 divisors (see below), whose sum is σ = 103660413568. Its totient is φ = 97181637660.

The previous prime is 100421025583. The next prime is 100421025629. The reversal of 100421025613 is 316520124001.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 316520124001 = 7639 ⋅41434759.

It is a cyclic number.

It is not a de Polignac number, because 100421025613 - 2¹³ = 100421017421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421085613) 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, 1619693931 + ... + 1619693992.

It is an arithmetic number, because the mean of its divisors is an integer number (25915103392).

Almost surely, 2^100421025613 is an apocalyptic number.

It is an amenable number.

100421025613 is a deficient number, since it is larger than the sum of its proper divisors (3239387955).

100421025613 is an equidigital number, since it uses as much as digits as its factorization.

100421025613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239387954.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 100421025613 its reverse (316520124001), we get a palindrome (416941149614).

The spelling of 100421025613 in words is "one hundred billion, four hundred twenty-one million, twenty-five thousand, six hundred thirteen".