21112431144111 has 12 divisors (see below), whose sum is σ = 30497173103488. Its totient is φ = 14074289836704.

The previous prime is 21112431144107. The next prime is 21112431144113. The reversal of 21112431144111 is 11144113421112.

21112431144111 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 243 + 1 + 1 + 4 + 411 + 1 = 666.

It is not a de Polignac number, because 21112431144111 - 2² = 21112431144107 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 (21112431144113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55153615 + ... + 55535088.

Almost surely, 2^{21112431144111} is an apocalyptic number.

21112431144111 is a deficient number, since it is larger than the sum of its proper divisors (9384741959377).

21112431144111 is a wasteful number, since it uses less digits than its factorization.

21112431144111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110709902 (or 110709899 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

Adding to 21112431144111 its reverse (11144113421112), we get a palindrome (32256544565223).

The spelling of 21112431144111 in words is "twenty-one trillion, one hundred twelve billion, four hundred thirty-one million, one hundred forty-four thousand, one hundred eleven".