21402123103201 has 8 divisors (see below), whose sum is σ = 21695402880000. Its totient is φ = 21108846029472.

The previous prime is 21402123103181. The next prime is 21402123103247. The reversal of 21402123103201 is 10230132120412.

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

It is a cyclic number.

It is not a de Polignac number, because 21402123103201 - 2¹⁹ = 21402122578913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21402123103271) 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, 19276800 + ... + 20356798.

It is an arithmetic number, because the mean of its divisors is an integer number (2711925360000).

Almost surely, 2^{21402123103201} is an apocalyptic number.

It is an amenable number.

21402123103201 is a deficient number, since it is larger than the sum of its proper divisors (293279776799).

21402123103201 is a wasteful number, since it uses less digits than its factorization.

21402123103201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351535.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21402123103201 its reverse (10230132120412), we get a palindrome (31632255223613).

The spelling of 21402123103201 in words is "twenty-one trillion, four hundred two billion, one hundred twenty-three million, one hundred three thousand, two hundred one".