1223201011011 has 24 divisors (see below), whose sum is σ = 1900335421440. Its totient is φ = 697820436432.

The previous prime is 1223201010991. The next prime is 1223201011073. The reversal of 1223201011011 is 1101101023221.

It is not a de Polignac number, because 1223201011011 - 2¹⁴ = 1223200994627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223201013011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6765051 + ... + 6943508.

It is an arithmetic number, because the mean of its divisors is an integer number (79180642560).

Almost surely, 2^{1223201011011} is an apocalyptic number.

1223201011011 is a deficient number, since it is larger than the sum of its proper divisors (677134410429).

1223201011011 is a wasteful number, since it uses less digits than its factorization.

1223201011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13709183 (or 13709176 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1223201011011 its reverse (1101101023221), we get a palindrome (2324302034232).

The spelling of 1223201011011 in words is "one trillion, two hundred twenty-three billion, two hundred one million, eleven thousand, eleven".