1213213012 has 12 divisors (see below), whose sum is σ = 2316134016. Its totient is φ = 551460440.

The previous prime is 1213213009. The next prime is 1213213013. The reversal of 1213213012 is 2103123121.

It is a super-2 number, since 2×1213213012² = 2943771624972224288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213213013) 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, 13786468 + ... + 13786555.

It is an arithmetic number, because the mean of its divisors is an integer number (193011168).

Almost surely, 2^1213213012 is an apocalyptic number.

It is an amenable number.

1213213012 is a deficient number, since it is larger than the sum of its proper divisors (1102921004).

1213213012 is a wasteful number, since it uses less digits than its factorization.

1213213012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27573038 (or 27573036 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1213213012 is about 34831.2074439001. The cubic root of 1213213012 is about 1066.5445967513.

Adding to 1213213012 its reverse (2103123121), we get a palindrome (3316336133).

The spelling of 1213213012 in words is "one billion, two hundred thirteen million, two hundred thirteen thousand, twelve".