1221110011133 has 4 divisors (see below), whose sum is σ = 1221239088348. Its totient is φ = 1220980933920.

The previous prime is 1221110011117. The next prime is 1221110011157. The reversal of 1221110011133 is 3311100111221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 447911624644 + 773198386489 = 669262^2 + 879317^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221110011133 - 2⁴ = 1221110011117 is a prime.

It is a super-2 number, since 2×1221110011133² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221110019133) 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, 64524416 + ... + 64543337.

It is an arithmetic number, because the mean of its divisors is an integer number (305309772087).

Almost surely, 2^{1221110011133} is an apocalyptic number.

It is an amenable number.

1221110011133 is a deficient number, since it is larger than the sum of its proper divisors (129077215).

1221110011133 is an equidigital number, since it uses as much as digits as its factorization.

1221110011133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129077214.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1221110011133 its reverse (3311100111221), we get a palindrome (4532210122354).

The spelling of 1221110011133 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, eleven thousand, one hundred thirty-three".