210121323312 has 20 divisors (see below), whose sum is σ = 542813418680. Its totient is φ = 70040441088.

The previous prime is 210121323253. The next prime is 210121323371. The reversal of 210121323312 is 213323121012.

It is an interprime number because it is at equal distance from previous prime (210121323253) and next prime (210121323371).

It is a super-3 number, since 3×210121323312³ (a number of 35 digits) contains 333 as substring.

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, 2188763737 + ... + 2188763832.

It is an arithmetic number, because the mean of its divisors is an integer number (27140670934).

Almost surely, 2^210121323312 is an apocalyptic number.

It is an amenable number.

210121323312 is an abundant number, since it is smaller than the sum of its proper divisors (332692095368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210121323312 is a wasteful number, since it uses less digits than its factorization.

210121323312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377527580 (or 4377527574 counting only the distinct ones).

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

Adding to 210121323312 its reverse (213323121012), we get a palindrome (423444444324).

The spelling of 210121323312 in words is "two hundred ten billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred twelve".