21413111 has 8 divisors (see below), whose sum is σ = 22156848. Its totient is φ = 20680000.

The previous prime is 21413101. The next prime is 21413123. The reversal of 21413111 is 11131412.

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 21413111 - 2¹⁸ = 21150967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21413101) 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, 1556 + ... + 6726.

It is an arithmetic number, because the mean of its divisors is an integer number (2769606).

Almost surely, 2^21413111 is an apocalyptic number.

21413111 is a deficient number, since it is larger than the sum of its proper divisors (743737).

21413111 is a wasteful number, since it uses less digits than its factorization.

21413111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5313.

The product of its digits is 24, while the sum is 14.

The square root of 21413111 is about 4627.4302804040. The cubic root of 21413111 is about 277.6897968418.

Adding to 21413111 its reverse (11131412), we get a palindrome (32544523).

The spelling of 21413111 in words is "twenty-one million, four hundred thirteen thousand, one hundred eleven".