12213212012 has 24 divisors (see below), whose sum is σ = 22634188416. Its totient is φ = 5746422528.

The previous prime is 12213211999. The next prime is 12213212057. The reversal of 12213212012 is 21021231221.

It is a super-2 number, since 2×12213212012² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 536453 + ... + 558755.

It is an arithmetic number, because the mean of its divisors is an integer number (943091184).

Almost surely, 2^12213212012 is an apocalyptic number.

It is an amenable number.

12213212012 is a deficient number, since it is larger than the sum of its proper divisors (10420976404).

12213212012 is a wasteful number, since it uses less digits than its factorization.

12213212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30377 (or 30375 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12213212012 its reverse (21021231221), we get a palindrome (33234443233).

The spelling of 12213212012 in words is "twelve billion, two hundred thirteen million, two hundred twelve thousand, twelve".