1223011232011 has 4 divisors (see below), whose sum is σ = 1223014813024. Its totient is φ = 1223007651000.

The previous prime is 1223011231997. The next prime is 1223011232021. The reversal of 1223011232011 is 1102321103221.

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 1223011232011 - 2²¹ = 1223009134859 is a prime.

It is a super-2 number, since 2×1223011232011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223011232011.

It is not an unprimeable number, because it can be changed into a prime (1223011232021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1216980 + ... + 1981681.

It is an arithmetic number, because the mean of its divisors is an integer number (305753703256).

Almost surely, 2^{1223011232011} is an apocalyptic number.

1223011232011 is a deficient number, since it is larger than the sum of its proper divisors (3581013).

1223011232011 is an equidigital number, since it uses as much as digits as its factorization.

1223011232011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581012.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1223011232011 its reverse (1102321103221), we get a palindrome (2325332335232).

The spelling of 1223011232011 in words is "one trillion, two hundred twenty-three billion, eleven million, two hundred thirty-two thousand, eleven".