21312101102001 has 4 divisors (see below), whose sum is σ = 28416134802672. Its totient is φ = 14208067401332.

The previous prime is 21312101101937. The next prime is 21312101102011. The reversal of 21312101102001 is 10020110121312.

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 21312101102001 - 2⁶ = 21312101101937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21312101102011) 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, 3552016850331 + ... + 3552016850336.

It is an arithmetic number, because the mean of its divisors is an integer number (7104033700668).

Almost surely, 2^{21312101102001} is an apocalyptic number.

It is an amenable number.

21312101102001 is a deficient number, since it is larger than the sum of its proper divisors (7104033700671).

21312101102001 is an equidigital number, since it uses as much as digits as its factorization.

21312101102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7104033700670.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21312101102001 its reverse (10020110121312), we get a palindrome (31332211223313).

The spelling of 21312101102001 in words is "twenty-one trillion, three hundred twelve billion, one hundred one million, one hundred two thousand, one".