12102011213 has 4 divisors (see below), whose sum is σ = 12163442940. Its totient is φ = 12040579488.

The previous prime is 12102011209. The next prime is 12102011237. The reversal of 12102011213 is 31211020121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31211020121 = 83 ⋅376036387.

It can be written as a sum of positive squares in 2 ways, for example, as 8451676489 + 3650334724 = 91933^2 + 60418^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102011213 - 2² = 12102011209 is a prime.

It is a super-3 number, since 3×12102011213³ (a number of 31 digits) contains 333 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 (12102091213) 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, 30715568 + ... + 30715961.

It is an arithmetic number, because the mean of its divisors is an integer number (3040860735).

Almost surely, 2^12102011213 is an apocalyptic number.

It is an amenable number.

12102011213 is a deficient number, since it is larger than the sum of its proper divisors (61431727).

12102011213 is an equidigital number, since it uses as much as digits as its factorization.

12102011213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61431726.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12102011213 its reverse (31211020121), we get a palindrome (43313031334).

The spelling of 12102011213 in words is "twelve billion, one hundred two million, eleven thousand, two hundred thirteen".