12122021057 has 2 divisors, whose sum is σ = 12122021058. Its totient is φ = 12122021056.

The previous prime is 12122021053. The next prime is 12122021063. The reversal of 12122021057 is 75012022121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11329260721 + 792760336 = 106439^2 + 28156^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122021057 - 2² = 12122021053 is a prime.

It is not a weakly prime, because it can be changed into another prime (12122021053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061010528 + 6061010529.

It is an arithmetic number, because the mean of its divisors is an integer number (6061010529).

Almost surely, 2^12122021057 is an apocalyptic number.

It is an amenable number.

12122021057 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122021057 is an equidigital number, since it uses as much as digits as its factorization.

12122021057 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 12122021057 its reverse (75012022121), we get a palindrome (87134043178).

The spelling of 12122021057 in words is "twelve billion, one hundred twenty-two million, twenty-one thousand, fifty-seven".