21120031222 has 8 divisors (see below), whose sum is σ = 31684670136. Its totient is φ = 10558474512.

The previous prime is 21120031217. The next prime is 21120031333. The reversal of 21120031222 is 22213002112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21120031196 and 21120031205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753343 + ... + 780874.

It is an arithmetic number, because the mean of its divisors is an integer number (3960583767).

Almost surely, 2^21120031222 is an apocalyptic number.

21120031222 is a deficient number, since it is larger than the sum of its proper divisors (10564638914).

21120031222 is a wasteful number, since it uses less digits than its factorization.

21120031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541102.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21120031222 its reverse (22213002112), we get a palindrome (43333033334).

The spelling of 21120031222 in words is "twenty-one billion, one hundred twenty million, thirty-one thousand, two hundred twenty-two".