1200110011221 has 32 divisors (see below), whose sum is σ = 1762859105280. Its totient is φ = 720156556800.

The previous prime is 1200110011211. The next prime is 1200110011223. The reversal of 1200110011221 is 1221100110021.

It is not a de Polignac number, because 1200110011221 - 2¹⁸ = 1200109749077 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200110011197 and 1200110011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200110011223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22716325 + ... + 22769093.

It is an arithmetic number, because the mean of its divisors is an integer number (55089347040).

Almost surely, 2^{1200110011221} is an apocalyptic number.

1200110011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200110011221 is a deficient number, since it is larger than the sum of its proper divisors (562749094059).

1200110011221 is a wasteful number, since it uses less digits than its factorization.

1200110011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59577.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1200110011221 its reverse (1221100110021), we get a palindrome (2421210121242).

The spelling of 1200110011221 in words is "one trillion, two hundred billion, one hundred ten million, eleven thousand, two hundred twenty-one".