21401034242233 has 16 divisors (see below), whose sum is σ = 21685733294400. Its totient is φ = 21116986617280.

The previous prime is 21401034242219. The next prime is 21401034242323. The reversal of 21401034242233 is 33224243010412.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21401034242233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21401034242195 and 21401034242204.

It is not an unprimeable number, because it can be changed into a prime (21401034240233) 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 15 ways as a sum of consecutive naturals, for example, 311620623 + ... + 311689291.

It is an arithmetic number, because the mean of its divisors is an integer number (1355358330900).

Almost surely, 2^{21401034242233} is an apocalyptic number.

It is an amenable number.

21401034242233 is a deficient number, since it is larger than the sum of its proper divisors (284699052167).

21401034242233 is a wasteful number, since it uses less digits than its factorization.

21401034242233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73352.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21401034242233 its reverse (33224243010412), we get a palindrome (54625277252645).

The spelling of 21401034242233 in words is "twenty-one trillion, four hundred one billion, thirty-four million, two hundred forty-two thousand, two hundred thirty-three".