1212301213 has 4 divisors (see below), whose sum is σ = 1276106560. Its totient is φ = 1148495868.

The previous prime is 1212301199. The next prime is 1212301217. The reversal of 1212301213 is 3121032121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3121032121 = 61 ⋅51164461.

It is a cyclic number.

It is not a de Polignac number, because 1212301213 - 2⁹ = 1212300701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212301217) 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, 31902645 + ... + 31902682.

It is an arithmetic number, because the mean of its divisors is an integer number (319026640).

Almost surely, 2^1212301213 is an apocalyptic number.

It is an amenable number.

1212301213 is a deficient number, since it is larger than the sum of its proper divisors (63805347).

1212301213 is an equidigital number, since it uses as much as digits as its factorization.

1212301213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63805346.

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

The square root of 1212301213 is about 34818.1161609872. The cubic root of 1212301213 is about 1066.2773400227.

Adding to 1212301213 its reverse (3121032121), we get a palindrome (4333333334).

The spelling of 1212301213 in words is "one billion, two hundred twelve million, three hundred one thousand, two hundred thirteen".