11233133221 has 2 divisors, whose sum is σ = 11233133222. Its totient is φ = 11233133220.

The previous prime is 11233133173. The next prime is 11233133239. The reversal of 11233133221 is 12233133211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10813088196 + 420045025 = 103986^2 + 20495^2 .

It is a cyclic number.

It is not a de Polignac number, because 11233133221 - 2¹⁷ = 11233002149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11233133192 and 11233133201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11233130221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5616566610 + 5616566611.

It is an arithmetic number, because the mean of its divisors is an integer number (5616566611).

Almost surely, 2^11233133221 is an apocalyptic number.

It is an amenable number.

11233133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11233133221 is an equidigital number, since it uses as much as digits as its factorization.

11233133221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

Adding to 11233133221 its reverse (12233133211), we get a palindrome (23466266432).

The spelling of 11233133221 in words is "eleven billion, two hundred thirty-three million, one hundred thirty-three thousand, two hundred twenty-one".