1213000213111 has 4 divisors (see below), whose sum is σ = 1213987195800. Its totient is φ = 1212013230424.

The previous prime is 1213000213109. The next prime is 1213000213141. The reversal of 1213000213111 is 1113120003121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213000213111 - 2¹ = 1213000213109 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 (1213000213141) 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, 493489501 + ... + 493491958.

It is an arithmetic number, because the mean of its divisors is an integer number (303496798950).

Almost surely, 2^{1213000213111} is an apocalyptic number.

1213000213111 is a deficient number, since it is larger than the sum of its proper divisors (986982689).

1213000213111 is an equidigital number, since it uses as much as digits as its factorization.

1213000213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986982688.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1213000213111 its reverse (1113120003121), we get a palindrome (2326120216232).

The spelling of 1213000213111 in words is "one trillion, two hundred thirteen billion, two hundred thirteen thousand, one hundred eleven".