100232012021 has 4 divisors (see below), whose sum is σ = 100274288544. Its totient is φ = 100189735500.

The previous prime is 100232011981. The next prime is 100232012029. The reversal of 100232012021 is 120210232001.

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: 120210232001 = 61 ⋅1970659541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100232012021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100232011987 and 100232012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100232012029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21134705 + ... + 21139446.

It is an arithmetic number, because the mean of its divisors is an integer number (25068572136).

Almost surely, 2^100232012021 is an apocalyptic number.

It is an amenable number.

100232012021 is a deficient number, since it is larger than the sum of its proper divisors (42276523).

100232012021 is an equidigital number, since it uses as much as digits as its factorization.

100232012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42276522.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 100232012021 its reverse (120210232001), we get a palindrome (220442244022).

The spelling of 100232012021 in words is "one hundred billion, two hundred thirty-two million, twelve thousand, twenty-one".