21224072104 has 16 divisors (see below), whose sum is σ = 39813232320. Its totient is φ = 10607210160.

The previous prime is 21224072101. The next prime is 21224072117. The reversal of 21224072104 is 40127042212.

It is a super-2 number, since 2×21224072104² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21224072101) 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, 584512 + ... + 619759.

It is an arithmetic number, because the mean of its divisors is an integer number (2488327020).

Almost surely, 2^21224072104 is an apocalyptic number.

It is an amenable number.

21224072104 is a deficient number, since it is larger than the sum of its proper divisors (18589160216).

21224072104 is a wasteful number, since it uses less digits than its factorization.

21224072104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206480 (or 1206476 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The spelling of 21224072104 in words is "twenty-one billion, two hundred twenty-four million, seventy-two thousand, one hundred four".