100021123001 has 4 divisors (see below), whose sum is σ = 101660813604. Its totient is φ = 98381432400.

The previous prime is 100021122997. The next prime is 100021123019. The reversal of 100021123001 is 100321120001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29198607376 + 70822515625 = 170876^2 + 266125^2 .

It is a cyclic number.

It is not a de Polignac number, because 100021123001 - 2² = 100021122997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021123021) 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, 819845210 + ... + 819845331.

It is an arithmetic number, because the mean of its divisors is an integer number (25415203401).

Almost surely, 2^100021123001 is an apocalyptic number.

It is an amenable number.

100021123001 is a deficient number, since it is larger than the sum of its proper divisors (1639690603).

100021123001 is an equidigital number, since it uses as much as digits as its factorization.

100021123001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639690602.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 100021123001 its reverse (100321120001), we get a palindrome (200342243002).

The spelling of 100021123001 in words is "one hundred billion, twenty-one million, one hundred twenty-three thousand, one".