21111422104 has 32 divisors (see below), whose sum is σ = 39704587920. Its totient is φ = 10523575296.

The previous prime is 21111422093. The next prime is 21111422141. The reversal of 21111422104 is 40122411112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6846147 + ... + 6849229.

Almost surely, 2^21111422104 is an apocalyptic number.

It is an amenable number.

21111422104 is a deficient number, since it is larger than the sum of its proper divisors (18593165816).

21111422104 is a wasteful number, since it uses less digits than its factorization.

21111422104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5419 (or 5415 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21111422104 its reverse (40122411112), we get a palindrome (61233833216).

The spelling of 21111422104 in words is "twenty-one billion, one hundred eleven million, four hundred twenty-two thousand, one hundred four".