212020001022157 has 2 divisors, whose sum is σ = 212020001022158. Its totient is φ = 212020001022156.

The previous prime is 212020001022113. The next prime is 212020001022163. The reversal of 212020001022157 is 751220100020212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211880804127876 + 139196894281 = 14556126^2 + 373091^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020001022157 - 2³⁹ = 211470245208269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212020001022857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010000511078 + 106010000511079.

It is an arithmetic number, because the mean of its divisors is an integer number (106010000511079).

Almost surely, 2^{212020001022157} is an apocalyptic number.

It is an amenable number.

212020001022157 is a deficient number, since it is larger than the sum of its proper divisors (1).

212020001022157 is an equidigital number, since it uses as much as digits as its factorization.

212020001022157 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 25.

Adding to 212020001022157 its reverse (751220100020212), we get a palindrome (963240101042369).

The spelling of 212020001022157 in words is "two hundred twelve trillion, twenty billion, one million, twenty-two thousand, one hundred fifty-seven".