21120011422 has 4 divisors (see below), whose sum is σ = 31680017136. Its totient is φ = 10560005710.

The previous prime is 21120011401. The next prime is 21120011449. The reversal of 21120011422 is 22411002112.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21120011396 and 21120011405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280002854 + ... + 5280002857.

It is an arithmetic number, because the mean of its divisors is an integer number (7920004284).

Almost surely, 2^21120011422 is an apocalyptic number.

21120011422 is a deficient number, since it is larger than the sum of its proper divisors (10560005714).

21120011422 is a wasteful number, since it uses less digits than its factorization.

21120011422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560005713.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21120011422 its reverse (22411002112), we get a palindrome (43531013534).

The spelling of 21120011422 in words is "twenty-one billion, one hundred twenty million, eleven thousand, four hundred twenty-two".