1212221233311 has 16 divisors (see below), whose sum is σ = 1763274078720. Its totient is φ = 734661537920.

The previous prime is 1212221233271. The next prime is 1212221233373. The reversal of 1212221233311 is 1133321222121.

It is a cyclic number.

It is not a de Polignac number, because 1212221233311 - 2⁷ = 1212221233183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212221233211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985975 + ... + 1842983.

It is an arithmetic number, because the mean of its divisors is an integer number (110204629920).

Almost surely, 2^{1212221233311} is an apocalyptic number.

1212221233311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212221233311 is a deficient number, since it is larger than the sum of its proper divisors (551052845409).

1212221233311 is a wasteful number, since it uses less digits than its factorization.

1212221233311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899886.

The product of its digits is 864, while the sum is 24.

Adding to 1212221233311 its reverse (1133321222121), we get a palindrome (2345542455432).

The spelling of 1212221233311 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred thirty-three thousand, three hundred eleven".