21112033004 has 12 divisors (see below), whose sum is σ = 36948940728. Its totient is φ = 10555192800.

The previous prime is 21112032983. The next prime is 21112033009. The reversal of 21112033004 is 40033021112.

It is not an unprimeable number, because it can be changed into a prime (21112033009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146342 + ... + 252269.

It is an arithmetic number, because the mean of its divisors is an integer number (3079078394).

Almost surely, 2^21112033004 is an apocalyptic number.

It is an amenable number.

21112033004 is a deficient number, since it is larger than the sum of its proper divisors (15836907724).

21112033004 is a wasteful number, since it uses less digits than its factorization.

21112033004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411856 (or 411854 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21112033004 its reverse (40033021112), we get a palindrome (61145054116).

The spelling of 21112033004 in words is "twenty-one billion, one hundred twelve million, thirty-three thousand, four".