210121030312 has 32 divisors (see below), whose sum is σ = 407568268800. Its totient is φ = 101450865600.

The previous prime is 210121030279. The next prime is 210121030313. The reversal of 210121030312 is 213030121012.

It is not an unprimeable number, because it can be changed into a prime (210121030313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804612 + ... + 1033267.

It is an arithmetic number, because the mean of its divisors is an integer number (12736508400).

Almost surely, 2^210121030312 is an apocalyptic number.

It is an amenable number.

210121030312 is a deficient number, since it is larger than the sum of its proper divisors (197447238488).

210121030312 is a wasteful number, since it uses less digits than its factorization.

210121030312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838377 (or 1838373 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 210121030312 its reverse (213030121012), we get a palindrome (423151151324).

The spelling of 210121030312 in words is "two hundred ten billion, one hundred twenty-one million, thirty thousand, three hundred twelve".