21100011122 has 8 divisors (see below), whose sum is σ = 31654166700. Its totient is φ = 10548622224.

The previous prime is 21100011071. The next prime is 21100011143. The reversal of 21100011122 is 22111000112.

It can be written as a sum of positive squares in 2 ways, for example, as 18618875401 + 2481135721 = 136451^2 + 49811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672497 + ... + 703172.

Almost surely, 2^21100011122 is an apocalyptic number.

21100011122 is a deficient number, since it is larger than the sum of its proper divisors (10554155578).

21100011122 is a wasteful number, since it uses less digits than its factorization.

21100011122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383340.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21100011122 its reverse (22111000112), we get a palindrome (43211011234).

The spelling of 21100011122 in words is "twenty-one billion, one hundred million, eleven thousand, one hundred twenty-two".