21401204333333 has 16 divisors (see below), whose sum is σ = 25089064524864. Its totient is φ = 18037889506560.

The previous prime is 21401204333261. The next prime is 21401204333359. The reversal of 21401204333333 is 33333340210412.

It is not a de Polignac number, because 21401204333333 - 2²⁶ = 21401137224469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21401204333333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401204333393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 854054210 + ... + 854079267.

It is an arithmetic number, because the mean of its divisors is an integer number (1568066532804).

Almost surely, 2^{21401204333333} is an apocalyptic number.

It is an amenable number.

21401204333333 is a deficient number, since it is larger than the sum of its proper divisors (3687860191531).

21401204333333 is a wasteful number, since it uses less digits than its factorization.

21401204333333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708133572.

The product of its (nonzero) digits is 46656, while the sum is 32.

Adding to 21401204333333 its reverse (33333340210412), we get a palindrome (54734544543745).

The spelling of 21401204333333 in words is "twenty-one trillion, four hundred one billion, two hundred four million, three hundred thirty-three thousand, three hundred thirty-three".