1212012329 has 4 divisors (see below), whose sum is σ = 1322195280. Its totient is φ = 1101829380.

The previous prime is 1212012313. The next prime is 1212012343. The reversal of 1212012329 is 9232102121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212012329 - 2⁴ = 1212012313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212012929) 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, 55091459 + ... + 55091480.

It is an arithmetic number, because the mean of its divisors is an integer number (330548820).

Almost surely, 2^1212012329 is an apocalyptic number.

It is an amenable number.

1212012329 is a deficient number, since it is larger than the sum of its proper divisors (110182951).

1212012329 is a wasteful number, since it uses less digits than its factorization.

1212012329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110182950.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1212012329 is about 34813.9674412440. The cubic root of 1212012329 is about 1066.1926374944.

The spelling of 1212012329 in words is "one billion, two hundred twelve million, twelve thousand, three hundred twenty-nine".