21233044042 has 16 divisors (see below), whose sum is σ = 36438373440. Its totient is φ = 9090158688.

The previous prime is 21233044039. The next prime is 21233044061. The reversal of 21233044042 is 24044033212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21233043998 and 21233044016.

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, 796192 + ... + 822427.

It is an arithmetic number, because the mean of its divisors is an integer number (2277398340).

Almost surely, 2^21233044042 is an apocalyptic number.

21233044042 is a deficient number, since it is larger than the sum of its proper divisors (15205329398).

21233044042 is a wasteful number, since it uses less digits than its factorization.

21233044042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619565.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21233044042 its reverse (24044033212), we get a palindrome (45277077254).

The spelling of 21233044042 in words is "twenty-one billion, two hundred thirty-three million, forty-four thousand, forty-two".