21431066013411 has 16 divisors (see below), whose sum is σ = 28639599945216. Its totient is φ = 14254961456736.

The previous prime is 21431066013403. The next prime is 21431066013463. The reversal of 21431066013411 is 11431066013412.

It is not a de Polignac number, because 21431066013411 - 2³ = 21431066013403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21431066013811) 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, 11944701 + ... + 13621233.

It is an arithmetic number, because the mean of its divisors is an integer number (1789974996576).

Almost surely, 2^{21431066013411} is an apocalyptic number.

21431066013411 is a deficient number, since it is larger than the sum of its proper divisors (7208533931805).

21431066013411 is a wasteful number, since it uses less digits than its factorization.

21431066013411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686202.

The product of its (nonzero) digits is 10368, while the sum is 33.

Subtracting from 21431066013411 its reverse (11431066013412), we obtain a palindrome (9999999999999).

The spelling of 21431066013411 in words is "twenty-one trillion, four hundred thirty-one billion, sixty-six million, thirteen thousand, four hundred eleven".