210064122157 has 2 divisors, whose sum is σ = 210064122158. Its totient is φ = 210064122156.

The previous prime is 210064122119. The next prime is 210064122161. The reversal of 210064122157 is 751221460012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201878577481 + 8185544676 = 449309^2 + 90474^2 .

It is a cyclic number.

It is not a de Polignac number, because 210064122157 - 2⁷ = 210064122029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210064122197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105032061078 + 105032061079.

It is an arithmetic number, because the mean of its divisors is an integer number (105032061079).

Almost surely, 2^210064122157 is an apocalyptic number.

It is an amenable number.

210064122157 is a deficient number, since it is larger than the sum of its proper divisors (1).

210064122157 is an equidigital number, since it uses as much as digits as its factorization.

210064122157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

Adding to 210064122157 its reverse (751221460012), we get a palindrome (961285582169).

The spelling of 210064122157 in words is "two hundred ten billion, sixty-four million, one hundred twenty-two thousand, one hundred fifty-seven".