23001203221 has 2 divisors, whose sum is σ = 23001203222. Its totient is φ = 23001203220.

The previous prime is 23001203213. The next prime is 23001203233. The reversal of 23001203221 is 12230210032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18580416100 + 4420787121 = 136310^2 + 66489^2 .

It is a cyclic number.

It is not a de Polignac number, because 23001203221 - 2³ = 23001203213 is a prime.

It is a super-2 number, since 2×23001203221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23001203195 and 23001203204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23001203921) 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, 11500601610 + 11500601611.

It is an arithmetic number, because the mean of its divisors is an integer number (11500601611).

Almost surely, 2^23001203221 is an apocalyptic number.

It is an amenable number.

23001203221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23001203221 is an equidigital number, since it uses as much as digits as its factorization.

23001203221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23001203221 its reverse (12230210032), we get a palindrome (35231413253).

The spelling of 23001203221 in words is "twenty-three billion, one million, two hundred three thousand, two hundred twenty-one".