1201223100011 has 4 divisors (see below), whose sum is σ = 1310425200024. Its totient is φ = 1092021000000.

The previous prime is 1201223099977. The next prime is 1201223100083. The reversal of 1201223100011 is 1100013221021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201223100011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201223100211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54601049990 + ... + 54601050011.

It is an arithmetic number, because the mean of its divisors is an integer number (327606300006).

Almost surely, 2^{1201223100011} is an apocalyptic number.

1201223100011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201223100011 is a deficient number, since it is larger than the sum of its proper divisors (109202100013).

1201223100011 is a wasteful number, since it uses less digits than its factorization.

1201223100011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109202100012.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1201223100011 its reverse (1100013221021), we get a palindrome (2301236321032).

The spelling of 1201223100011 in words is "one trillion, two hundred one billion, two hundred twenty-three million, one hundred thousand, eleven".