210122404 has 6 divisors (see below), whose sum is σ = 367714214. Its totient is φ = 105061200.

The previous prime is 210122401. The next prime is 210122443. The reversal of 210122404 is 404221012.

It can be written as a sum of positive squares in only one way, i.e., 178222500 + 31899904 = 13350^2 + 5648^2 .

It is not an unprimeable number, because it can be changed into a prime (210122401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26265297 + ... + 26265304.

Almost surely, 2^210122404 is an apocalyptic number.

It is an amenable number.

210122404 is a deficient number, since it is larger than the sum of its proper divisors (157591810).

210122404 is a wasteful number, since it uses less digits than its factorization.

210122404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52530605 (or 52530603 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 210122404 is about 14495.5994701840. The cubic root of 210122404 is about 594.5076585318.

Adding to 210122404 its reverse (404221012), we get a palindrome (614343416).

The spelling of 210122404 in words is "two hundred ten million, one hundred twenty-two thousand, four hundred four".