1213222012 has 24 divisors (see below), whose sum is σ = 2159514000. Its totient is φ = 596297856.

The previous prime is 1213222001. The next prime is 1213222013. The reversal of 1213222012 is 2102223121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213222013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51739 + ... + 71437.

It is an arithmetic number, because the mean of its divisors is an integer number (89979750).

Almost surely, 2^1213222012 is an apocalyptic number.

It is an amenable number.

1213222012 is a deficient number, since it is larger than the sum of its proper divisors (946291988).

1213222012 is a wasteful number, since it uses less digits than its factorization.

1213222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19965 (or 19963 counting only the distinct ones).

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

The square root of 1213222012 is about 34831.3366381481. The cubic root of 1213222012 is about 1066.5472340671.

Adding to 1213222012 its reverse (2102223121), we get a palindrome (3315445133).

The spelling of 1213222012 in words is "one billion, two hundred thirteen million, two hundred twenty-two thousand, twelve".