20121225233 has 2 divisors, whose sum is σ = 20121225234. Its totient is φ = 20121225232.

The previous prime is 20121225181. The next prime is 20121225259. The reversal of 20121225233 is 33252212102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12230811649 + 7890413584 = 110593^2 + 88828^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121225233 - 2¹² = 20121221137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121225199 and 20121225208.

It is not a weakly prime, because it can be changed into another prime (20121225433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060612616 + 10060612617.

It is an arithmetic number, because the mean of its divisors is an integer number (10060612617).

Almost surely, 2^20121225233 is an apocalyptic number.

It is an amenable number.

20121225233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121225233 is an equidigital number, since it uses as much as digits as its factorization.

20121225233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20121225233 its reverse (33252212102), we get a palindrome (53373437335).

The spelling of 20121225233 in words is "twenty billion, one hundred twenty-one million, two hundred twenty-five thousand, two hundred thirty-three".