20121201223 has 2 divisors, whose sum is σ = 20121201224. Its totient is φ = 20121201222.

The previous prime is 20121201209. The next prime is 20121201227. The reversal of 20121201223 is 32210212102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121201223 - 2⁹ = 20121200711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121201197 and 20121201206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121201227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060600611 + 10060600612.

It is an arithmetic number, because the mean of its divisors is an integer number (10060600612).

Almost surely, 2^20121201223 is an apocalyptic number.

20121201223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121201223 is an equidigital number, since it uses as much as digits as its factorization.

20121201223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121201223 its reverse (32210212102), we get a palindrome (52331413325).

The spelling of 20121201223 in words is "twenty billion, one hundred twenty-one million, two hundred one thousand, two hundred twenty-three".