1223321121011 has 16 divisors (see below), whose sum is σ = 1347115795200. Its totient is φ = 1101625445280.

The previous prime is 1223321120981. The next prime is 1223321121013. The reversal of 1223321121011 is 1101211233221.

It is a cyclic number.

It is not a de Polignac number, because 1223321121011 - 2⁶ = 1223321120947 is a prime.

It is a super-2 number, since 2×1223321121011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223321121013) 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, 17097890 + ... + 17169288.

It is an arithmetic number, because the mean of its divisors is an integer number (84194737200).

Almost surely, 2^{1223321121011} is an apocalyptic number.

1223321121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1223321121011 is a deficient number, since it is larger than the sum of its proper divisors (123794674189).

1223321121011 is a wasteful number, since it uses less digits than its factorization.

1223321121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86074.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1223321121011 its reverse (1101211233221), we get a palindrome (2324532354232).

The spelling of 1223321121011 in words is "one trillion, two hundred twenty-three billion, three hundred twenty-one million, one hundred twenty-one thousand, eleven".