210122145 has 12 divisors (see below), whose sum is σ = 364211796. Its totient is φ = 112065120.

The previous prime is 210122141. The next prime is 210122153. The reversal of 210122145 is 541221012.

It can be written as a sum of positive squares in 2 ways, for example, as 160883856 + 49238289 = 12684^2 + 7017^2 .

It is not a de Polignac number, because 210122145 - 2² = 210122141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210122141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2334646 + ... + 2334735.

It is an arithmetic number, because the mean of its divisors is an integer number (30350983).

Almost surely, 2^210122145 is an apocalyptic number.

It is an amenable number.

210122145 is a deficient number, since it is larger than the sum of its proper divisors (154089651).

210122145 is a wasteful number, since it uses less digits than its factorization.

210122145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669392 (or 4669389 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 210122145 is about 14495.5905364356. The cubic root of 210122145 is about 594.5074142653.

Adding to 210122145 its reverse (541221012), we get a palindrome (751343157).

The spelling of 210122145 in words is "two hundred ten million, one hundred twenty-two thousand, one hundred forty-five".