12221012033 has 4 divisors (see below), whose sum is σ = 12221292480. Its totient is φ = 12220731588.

The previous prime is 12221012017. The next prime is 12221012039. The reversal of 12221012033 is 33021012221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33021012221 = 139 ⋅237561239.

It is a cyclic number.

It is not a de Polignac number, because 12221012033 - 2⁴ = 12221012017 is a prime.

It is a super-2 number, since 2×12221012033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221012039) 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, 59285 + ... + 167202.

It is an arithmetic number, because the mean of its divisors is an integer number (3055323120).

Almost surely, 2^12221012033 is an apocalyptic number.

It is an amenable number.

12221012033 is a deficient number, since it is larger than the sum of its proper divisors (280447).

12221012033 is an equidigital number, since it uses as much as digits as its factorization.

12221012033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280446.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12221012033 its reverse (33021012221), we get a palindrome (45242024254).

The spelling of 12221012033 in words is "twelve billion, two hundred twenty-one million, twelve thousand, thirty-three".