210312133221 has 16 divisors (see below), whose sum is σ = 289971347904. Its totient is φ = 135509472384.

The previous prime is 210312133177. The next prime is 210312133237. The reversal of 210312133221 is 122331213012.

It is not a de Polignac number, because 210312133221 - 2¹⁴ = 210312116837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210312133261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9860376 + ... + 9881681.

It is an arithmetic number, because the mean of its divisors is an integer number (18123209244).

Almost surely, 2^210312133221 is an apocalyptic number.

It is an amenable number.

210312133221 is a deficient number, since it is larger than the sum of its proper divisors (79659214683).

210312133221 is a wasteful number, since it uses less digits than its factorization.

210312133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19742180.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 210312133221 its reverse (122331213012), we get a palindrome (332643346233).

The spelling of 210312133221 in words is "two hundred ten billion, three hundred twelve million, one hundred thirty-three thousand, two hundred twenty-one".