1211234512213 has 32 divisors (see below), whose sum is σ = 1349375788800. Its totient is φ = 1078040448000.

The previous prime is 1211234512171. The next prime is 1211234512223. The reversal of 1211234512213 is 3122154321121.

It is a cyclic number.

It is not a de Polignac number, because 1211234512213 - 2⁹ = 1211234511701 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 (1211234512223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81125533 + ... + 81140461.

It is an arithmetic number, because the mean of its divisors is an integer number (42167993400).

Almost surely, 2^{1211234512213} is an apocalyptic number.

It is an amenable number.

1211234512213 is a deficient number, since it is larger than the sum of its proper divisors (138141276587).

1211234512213 is a wasteful number, since it uses less digits than its factorization.

1211234512213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15853.

The product of its digits is 2880, while the sum is 28.

Adding to 1211234512213 its reverse (3122154321121), we get a palindrome (4333388833334).

The spelling of 1211234512213 in words is "one trillion, two hundred eleven billion, two hundred thirty-four million, five hundred twelve thousand, two hundred thirteen".