21123032013001 has 4 divisors (see below), whose sum is σ = 21158295840000. Its totient is φ = 21087768186004.

The previous prime is 21123032012983. The next prime is 21123032013053. The reversal of 21123032013001 is 10031023032112.

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 21123032013001 - 2⁵ = 21123032012969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21123032013001.

It is not an unprimeable number, because it can be changed into a prime (21123032013901) 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, 17631912601 + ... + 17631913798.

It is an arithmetic number, because the mean of its divisors is an integer number (5289573960000).

Almost surely, 2^{21123032013001} is an apocalyptic number.

It is an amenable number.

21123032013001 is a deficient number, since it is larger than the sum of its proper divisors (35263826999).

21123032013001 is an equidigital number, since it uses as much as digits as its factorization.

21123032013001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35263826998.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21123032013001 its reverse (10031023032112), we get a palindrome (31154055045113).

The spelling of 21123032013001 in words is "twenty-one trillion, one hundred twenty-three billion, thirty-two million, thirteen thousand, one".