211100112257 has 2 divisors, whose sum is σ = 211100112258. Its totient is φ = 211100112256.

The previous prime is 211100112241. The next prime is 211100112269. The reversal of 211100112257 is 752211001112.

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., 148659598096 + 62440514161 = 385564^2 + 249881^2 .

It is a cyclic number.

It is not a de Polignac number, because 211100112257 - 2⁴ = 211100112241 is a prime.

It is not a weakly prime, because it can be changed into another prime (211100112217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550056128 + 105550056129.

It is an arithmetic number, because the mean of its divisors is an integer number (105550056129).

Almost surely, 2^211100112257 is an apocalyptic number.

It is an amenable number.

211100112257 is a deficient number, since it is larger than the sum of its proper divisors (1).

211100112257 is an equidigital number, since it uses as much as digits as its factorization.

211100112257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 211100112257 its reverse (752211001112), we get a palindrome (963311113369).

The spelling of 211100112257 in words is "two hundred eleven billion, one hundred million, one hundred twelve thousand, two hundred fifty-seven".