12021220011257 has 2 divisors, whose sum is σ = 12021220011258. Its totient is φ = 12021220011256.

The previous prime is 12021220011149. The next prime is 12021220011299. The reversal of 12021220011257 is 75211002212021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11419999663801 + 601220347456 = 3379349^2 + 775384^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021220011257 - 2⁸ = 12021220011001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021220011557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010610005628 + 6010610005629.

It is an arithmetic number, because the mean of its divisors is an integer number (6010610005629).

Almost surely, 2^{12021220011257} is an apocalyptic number.

It is an amenable number.

12021220011257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021220011257 is an equidigital number, since it uses as much as digits as its factorization.

12021220011257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 12021220011257 its reverse (75211002212021), we get a palindrome (87232222223278).

The spelling of 12021220011257 in words is "twelve trillion, twenty-one billion, two hundred twenty million, eleven thousand, two hundred fifty-seven".