21141461111 has 2 divisors, whose sum is σ = 21141461112. Its totient is φ = 21141461110.

The previous prime is 21141461093. The next prime is 21141461183. The reversal of 21141461111 is 11116414112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21141461111 - 2³⁴ = 3961591927 is a prime.

It is a super-2 number, since 2×21141461111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21141461311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570730555 + 10570730556.

It is an arithmetic number, because the mean of its divisors is an integer number (10570730556).

Almost surely, 2^21141461111 is an apocalyptic number.

21141461111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141461111 is an equidigital number, since it uses as much as digits as its factorization.

21141461111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 23.

Adding to 21141461111 its reverse (11116414112), we get a palindrome (32257875223).

The spelling of 21141461111 in words is "twenty-one billion, one hundred forty-one million, four hundred sixty-one thousand, one hundred eleven".