210121232 has 20 divisors (see below), whose sum is σ = 407668476. Its totient is φ = 104916480.

The previous prime is 210121217. The next prime is 210121259. The reversal of 210121232 is 232121012.

It is a happy number.

210121232 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 2876416 + 207244816 = 1696^2 + 14396^2 .

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3548 + ... + 20804.

Almost surely, 2^210121232 is an apocalyptic number.

It is an amenable number.

210121232 is a deficient number, since it is larger than the sum of its proper divisors (197547244).

210121232 is a wasteful number, since it uses less digits than its factorization.

210121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18026 (or 18020 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 210121232 is about 14495.5590440659. The cubic root of 210121232 is about 594.5065532010.

Adding to 210121232 its reverse (232121012), we get a palindrome (442242244).

The spelling of 210121232 in words is "two hundred ten million, one hundred twenty-one thousand, two hundred thirty-two".