21111042411 has 6 divisors (see below), whose sum is σ = 30493727940. Its totient is φ = 14074028268.

The previous prime is 21111042401. The next prime is 21111042419. The reversal of 21111042411 is 11424011112.

21111042411 is a `hidden beast` number, since 211 + 1 + 1 + 0 + 42 + 411 = 666.

It is not a de Polignac number, because 21111042411 - 2¹⁵ = 21111009643 is a prime.

It is a super-2 number, since 2×21111042411² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21111042419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1172835681 + ... + 1172835698.

It is an arithmetic number, because the mean of its divisors is an integer number (5082287990).

Almost surely, 2^21111042411 is an apocalyptic number.

21111042411 is a deficient number, since it is larger than the sum of its proper divisors (9382685529).

21111042411 is a wasteful number, since it uses less digits than its factorization.

21111042411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345671385 (or 2345671382 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21111042411 its reverse (11424011112), we get a palindrome (32535053523).

The spelling of 21111042411 in words is "twenty-one billion, one hundred eleven million, forty-two thousand, four hundred eleven".