1221233220133 has 8 divisors (see below), whose sum is σ = 1222345935360. Its totient is φ = 1220120983920.

The previous prime is 1221233220101. The next prime is 1221233220143. The reversal of 1221233220133 is 3310223321221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221233220133 - 2⁵ = 1221233220101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221233220098 and 1221233220107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221233220143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5083968 + ... + 5318758.

It is an arithmetic number, because the mean of its divisors is an integer number (152793241920).

Almost surely, 2^{1221233220133} is an apocalyptic number.

It is an amenable number.

1221233220133 is a deficient number, since it is larger than the sum of its proper divisors (1112715227).

1221233220133 is a wasteful number, since it uses less digits than its factorization.

1221233220133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239507.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1221233220133 its reverse (3310223321221), we get a palindrome (4531456541354).

The spelling of 1221233220133 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-three million, two hundred twenty thousand, one hundred thirty-three".