212102121010057 has 2 divisors, whose sum is σ = 212102121010058. Its totient is φ = 212102121010056.

The previous prime is 212102121010033. The next prime is 212102121010079. The reversal of 212102121010057 is 750010121201212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202892134248441 + 9209986761616 = 14244021^2 + 3034796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212102121010057 is a prime.

It is not a weakly prime, because it can be changed into another prime (212102121019057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051060505028 + 106051060505029.

It is an arithmetic number, because the mean of its divisors is an integer number (106051060505029).

Almost surely, 2^{212102121010057} is an apocalyptic number.

It is an amenable number.

212102121010057 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102121010057 is an equidigital number, since it uses as much as digits as its factorization.

212102121010057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

Adding to 212102121010057 its reverse (750010121201212), we get a palindrome (962112242211269).

The spelling of 212102121010057 in words is "two hundred twelve trillion, one hundred two billion, one hundred twenty-one million, ten thousand, fifty-seven".