1233133121221 has 4 divisors (see below), whose sum is σ = 1261810635712. Its totient is φ = 1204455606732.

The previous prime is 1233133121219. The next prime is 1233133121239. The reversal of 1233133121221 is 1221213313321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1233133121221 - 2¹ = 1233133121219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233133121251) 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, 14338757181 + ... + 14338757266.

It is an arithmetic number, because the mean of its divisors is an integer number (315452658928).

Almost surely, 2^{1233133121221} is an apocalyptic number.

It is an amenable number.

1233133121221 is a deficient number, since it is larger than the sum of its proper divisors (28677514491).

1233133121221 is an equidigital number, since it uses as much as digits as its factorization.

1233133121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28677514490.

The product of its digits is 1296, while the sum is 25.

Adding to 1233133121221 its reverse (1221213313321), we get a palindrome (2454346434542).

The spelling of 1233133121221 in words is "one trillion, two hundred thirty-three billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred twenty-one".