210135102257 has 2 divisors, whose sum is σ = 210135102258. Its totient is φ = 210135102256.

The previous prime is 210135102253. The next prime is 210135102263. The reversal of 210135102257 is 752201531012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162119774881 + 48015327376 = 402641^2 + 219124^2 .

It is a cyclic number.

It is not a de Polignac number, because 210135102257 - 2² = 210135102253 is a prime.

It is a super-2 number, since 2×210135102257² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210135102253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105067551128 + 105067551129.

It is an arithmetic number, because the mean of its divisors is an integer number (105067551129).

Almost surely, 2^210135102257 is an apocalyptic number.

It is an amenable number.

210135102257 is a deficient number, since it is larger than the sum of its proper divisors (1).

210135102257 is an equidigital number, since it uses as much as digits as its factorization.

210135102257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

Adding to 210135102257 its reverse (752201531012), we get a palindrome (962336633269).

The spelling of 210135102257 in words is "two hundred ten billion, one hundred thirty-five million, one hundred two thousand, two hundred fifty-seven".