21111051141 has 20 divisors (see below), whose sum is σ = 31588807404. Its totient is φ = 14050584000.

The previous prime is 21111051131. The next prime is 21111051211. The reversal of 21111051141 is 14115011112.

21111051141 is a `hidden beast` number, since 2 + 1 + 1 + 110 + 511 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12442510116 + 8668541025 = 111546^2 + 93105^2 .

It is not a de Polignac number, because 21111051141 - 2⁵ = 21111051109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111051121) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 168150 + ... + 265511.

Almost surely, 2^21111051141 is an apocalyptic number.

It is an amenable number.

21111051141 is a deficient number, since it is larger than the sum of its proper divisors (10477756263).

21111051141 is an equidigital number, since it uses as much as digits as its factorization.

21111051141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434274 (or 434265 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 18.

Adding to 21111051141 its reverse (14115011112), we get a palindrome (35226062253).

The spelling of 21111051141 in words is "twenty-one billion, one hundred eleven million, fifty-one thousand, one hundred forty-one".