1212412031 has 4 divisors (see below), whose sum is σ = 1212765000. Its totient is φ = 1212059064.

The previous prime is 1212412013. The next prime is 1212412043. The reversal of 1212412031 is 1302142121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212412031 is a prime.

It is a super-2 number, since 2×1212412031² = 2939885865827089922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212412081) 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, 171281 + ... + 178218.

It is an arithmetic number, because the mean of its divisors is an integer number (303191250).

Almost surely, 2^1212412031 is an apocalyptic number.

1212412031 is a deficient number, since it is larger than the sum of its proper divisors (352969).

1212412031 is an equidigital number, since it uses as much as digits as its factorization.

1212412031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352968.

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

The square root of 1212412031 is about 34819.7075088232. The cubic root of 1212412031 is about 1066.3098289566.

Adding to 1212412031 its reverse (1302142121), we get a palindrome (2514554152).

The spelling of 1212412031 in words is "one billion, two hundred twelve million, four hundred twelve thousand, thirty-one".