1212213222111 has 8 divisors (see below), whose sum is σ = 1646780226480. Its totient is φ = 792894182912.

The previous prime is 1212213222067. The next prime is 1212213222133. The reversal of 1212213222111 is 1112223122121.

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 1212213222111 - 2⁹ = 1212213221599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212213220111) 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, 3811991106 + ... + 3811991423.

It is an arithmetic number, because the mean of its divisors is an integer number (205847528310).

Almost surely, 2^{1212213222111} is an apocalyptic number.

1212213222111 is a deficient number, since it is larger than the sum of its proper divisors (434567004369).

1212213222111 is an equidigital number, since it uses as much as digits as its factorization.

1212213222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7623982585.

The product of its digits is 192, while the sum is 21.

Adding to 1212213222111 its reverse (1112223122121), we get a palindrome (2324436344232).

The spelling of 1212213222111 in words is "one trillion, two hundred twelve billion, two hundred thirteen million, two hundred twenty-two thousand, one hundred eleven".