21061412111 has 8 divisors (see below), whose sum is σ = 21427348800. Its totient is φ = 20696142240.

The previous prime is 21061412107. The next prime is 21061412123. The reversal of 21061412111 is 11121416012.

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 21061412111 - 2² = 21061412107 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 (21061412101) 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, 102776 + ... + 229533.

It is an arithmetic number, because the mean of its divisors is an integer number (2678418600).

Almost surely, 2^21061412111 is an apocalyptic number.

21061412111 is a deficient number, since it is larger than the sum of its proper divisors (365936689).

21061412111 is a wasteful number, since it uses less digits than its factorization.

21061412111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333409.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 21061412111 its reverse (11121416012), we get a palindrome (32182828123).

The spelling of 21061412111 in words is "twenty-one billion, sixty-one million, four hundred twelve thousand, one hundred eleven".