12010257221 has 2 divisors, whose sum is σ = 12010257222. Its totient is φ = 12010257220.

The previous prime is 12010257199. The next prime is 12010257241. The reversal of 12010257221 is 12275201021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11385957025 + 624300196 = 106705^2 + 24986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12010257221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12010257241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005128610 + 6005128611.

It is an arithmetic number, because the mean of its divisors is an integer number (6005128611).

Almost surely, 2^12010257221 is an apocalyptic number.

It is an amenable number.

12010257221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12010257221 is an equidigital number, since it uses as much as digits as its factorization.

12010257221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 12010257221 its reverse (12275201021), we get a palindrome (24285458242).

The spelling of 12010257221 in words is "twelve billion, ten million, two hundred fifty-seven thousand, two hundred twenty-one".