1211111113213 has 8 divisors (see below), whose sum is σ = 1300414253760. Its totient is φ = 1123814784960.

The previous prime is 1211111113207. The next prime is 1211111113253. The reversal of 1211111113213 is 3123111111121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211111113213 - 2²⁹ = 1210574242301 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 (1211111113253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501701823 + ... + 501704236.

It is an arithmetic number, because the mean of its divisors is an integer number (162551781720).

Almost surely, 2^{1211111113213} is an apocalyptic number.

It is an amenable number.

1211111113213 is a deficient number, since it is larger than the sum of its proper divisors (89303140547).

1211111113213 is a wasteful number, since it uses less digits than its factorization.

1211111113213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003406147.

The product of its digits is 36, while the sum is 19.

Adding to 1211111113213 its reverse (3123111111121), we get a palindrome (4334222224334).

It can be divided in two parts, 12111111 and 13213, that added together give a square (12124324 = 3482²).

The spelling of 1211111113213 in words is "one trillion, two hundred eleven billion, one hundred eleven million, one hundred thirteen thousand, two hundred thirteen".