21144423122101 has 8 divisors (see below), whose sum is σ = 21152852264960. Its totient is φ = 21135995595792.

The previous prime is 21144423122059. The next prime is 21144423122107. The reversal of 21144423122101 is 10122132444112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21144423122101 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 21144423122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144423122107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26106436 + ... + 26904178.

It is an arithmetic number, because the mean of its divisors is an integer number (2644106533120).

Almost surely, 2^{21144423122101} is an apocalyptic number.

It is an amenable number.

21144423122101 is a deficient number, since it is larger than the sum of its proper divisors (8429142859).

21144423122101 is an equidigital number, since it uses as much as digits as its factorization.

21144423122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808275.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 21144423122101 its reverse (10122132444112), we get a palindrome (31266555566213).

The spelling of 21144423122101 in words is "twenty-one trillion, one hundred forty-four billion, four hundred twenty-three million, one hundred twenty-two thousand, one hundred one".