210110221157 has 2 divisors, whose sum is σ = 210110221158. Its totient is φ = 210110221156.

The previous prime is 210110221127. The next prime is 210110221271. The reversal of 210110221157 is 751122011012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119822591716 + 90287629441 = 346154^2 + 300479^2 .

It is a cyclic number.

It is not a de Polignac number, because 210110221157 - 2⁶ = 210110221093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210110221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055110578 + 105055110579.

It is an arithmetic number, because the mean of its divisors is an integer number (105055110579).

Almost surely, 2^210110221157 is an apocalyptic number.

It is an amenable number.

210110221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

210110221157 is an equidigital number, since it uses as much as digits as its factorization.

210110221157 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 210110221157 its reverse (751122011012), we get a palindrome (961232232169).

The spelling of 210110221157 in words is "two hundred ten billion, one hundred ten million, two hundred twenty-one thousand, one hundred fifty-seven".