21222003221612 has 12 divisors (see below), whose sum is σ = 38753223274416. Its totient is φ = 10149653714640.

The previous prime is 21222003221609. The next prime is 21222003221621. The reversal of 21222003221612 is 21612230022212.

It is a super-2 number, since 2×21222003221612² (a number of 27 digits) contains 22 as substring.

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, 115336973939 + ... + 115336974122.

It is an arithmetic number, because the mean of its divisors is an integer number (3229435272868).

Almost surely, 2^{21222003221612} is an apocalyptic number.

It is an amenable number.

21222003221612 is a deficient number, since it is larger than the sum of its proper divisors (17531220052804).

21222003221612 is a wasteful number, since it uses less digits than its factorization.

21222003221612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230673948088 (or 230673948086 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21222003221612 its reverse (21612230022212), we get a palindrome (42834233243824).

The spelling of 21222003221612 in words is "twenty-one trillion, two hundred twenty-two billion, three million, two hundred twenty-one thousand, six hundred twelve".