210112021021221 has 48 divisors (see below), whose sum is σ = 334053422644032. Its totient is φ = 126199407398400.

The previous prime is 210112021021213. The next prime is 210112021021247. The reversal of 210112021021221 is 122120120211012.

210112021021221 is a `hidden beast` number, since 2 + 101 + 120 + 210 + 212 + 21 = 666.

It is not a de Polignac number, because 210112021021221 - 2³ = 210112021021213 is a prime.

It is a super-2 number, since 2×210112021021221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210112021021194 and 210112021021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210112029021221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98068206 + ... + 100187808.

It is an arithmetic number, because the mean of its divisors is an integer number (6959446305084).

Almost surely, 2^{210112021021221} is an apocalyptic number.

It is an amenable number.

210112021021221 is a deficient number, since it is larger than the sum of its proper divisors (123941401622811).

210112021021221 is a wasteful number, since it uses less digits than its factorization.

210112021021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128594 (or 2128591 counting only the distinct ones).

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

Adding to 210112021021221 its reverse (122120120211012), we get a palindrome (332232141232233).

The spelling of 210112021021221 in words is "two hundred ten trillion, one hundred twelve billion, twenty-one million, twenty-one thousand, two hundred twenty-one".