1221303223133 has 16 divisors (see below), whose sum is σ = 1474823454720. Its totient is φ = 987964064496.

The previous prime is 1221303223121. The next prime is 1221303223141. The reversal of 1221303223133 is 3313223031221.

It is a cyclic number.

It is not a de Polignac number, because 1221303223133 - 2⁴ = 1221303223117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221303223433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17422685 + ... + 17492642.

It is an arithmetic number, because the mean of its divisors is an integer number (92176465920).

Almost surely, 2^{1221303223133} is an apocalyptic number.

It is an amenable number.

1221303223133 is a deficient number, since it is larger than the sum of its proper divisors (253520231587).

1221303223133 is a wasteful number, since it uses less digits than its factorization.

1221303223133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34915616.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1221303223133 its reverse (3313223031221), we get a palindrome (4534526254354).

The spelling of 1221303223133 in words is "one trillion, two hundred twenty-one billion, three hundred three million, two hundred twenty-three thousand, one hundred thirty-three".