210221121020112 has 60 divisors (see below), whose sum is σ = 588605861885184. Its totient is φ = 70040512349760.

The previous prime is 210221121020077. The next prime is 210221121020137. The reversal of 210221121020112 is 211020121122012.

210221121020112 is a `hidden beast` number, since 21 + 0 + 221 + 1 + 210 + 201 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345472638 + ... + 346080605.

Almost surely, 2^{210221121020112} is an apocalyptic number.

It is an amenable number.

210221121020112 is an abundant number, since it is smaller than the sum of its proper divisors (378384740865072).

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

210221121020112 is a wasteful number, since it uses less digits than its factorization.

210221121020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691555368 (or 691555359 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210221121020112 its reverse (211020121122012), we get a palindrome (421241242142124).

The spelling of 210221121020112 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty thousand, one hundred twelve".