12021023057 has 2 divisors, whose sum is σ = 12021023058. Its totient is φ = 12021023056.

The previous prime is 12021023033. The next prime is 12021023087. The reversal of 12021023057 is 75032012021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10072330321 + 1948692736 = 100361^2 + 44144^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021023057 - 2²⁰ = 12019974481 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021023087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010511528 + 6010511529.

It is an arithmetic number, because the mean of its divisors is an integer number (6010511529).

Almost surely, 2^12021023057 is an apocalyptic number.

It is an amenable number.

12021023057 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021023057 is an equidigital number, since it uses as much as digits as its factorization.

12021023057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

Adding to 12021023057 its reverse (75032012021), we get a palindrome (87053035078).

The spelling of 12021023057 in words is "twelve billion, twenty-one million, twenty-three thousand, fifty-seven".