12120211213 has 4 divisors (see below), whose sum is σ = 13222048608. Its totient is φ = 11018373820.

The previous prime is 12120211189. The next prime is 12120211237. The reversal of 12120211213 is 31211202121.

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 an interprime number because it is at equal distance from previous prime (12120211189) and next prime (12120211237).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120211213 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 (12120211513) 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, 550918681 + ... + 550918702.

It is an arithmetic number, because the mean of its divisors is an integer number (3305512152).

Almost surely, 2^12120211213 is an apocalyptic number.

It is an amenable number.

12120211213 is a deficient number, since it is larger than the sum of its proper divisors (1101837395).

12120211213 is a wasteful number, since it uses less digits than its factorization.

12120211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101837394.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12120211213 its reverse (31211202121), we get a palindrome (43331413334).

The spelling of 12120211213 in words is "twelve billion, one hundred twenty million, two hundred eleven thousand, two hundred thirteen".