21321121320101 has 4 divisors (see below), whose sum is σ = 22248126594912. Its totient is φ = 20394116045292.

The previous prime is 21321121320067. The next prime is 21321121320197. The reversal of 21321121320101 is 10102312112312.

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 21321121320101 - 2³⁴ = 21303941450917 is a prime.

It is a super-3 number, since 3×21321121320101³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321126320101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463502637371 + ... + 463502637416.

It is an arithmetic number, because the mean of its divisors is an integer number (5562031648728).

Almost surely, 2^{21321121320101} is an apocalyptic number.

It is an amenable number.

21321121320101 is a deficient number, since it is larger than the sum of its proper divisors (927005274811).

21321121320101 is an equidigital number, since it uses as much as digits as its factorization.

21321121320101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927005274810.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21321121320101 its reverse (10102312112312), we get a palindrome (31423433432413).

The spelling of 21321121320101 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty-one million, three hundred twenty thousand, one hundred one".