210031212222 has 96 divisors (see below), whose sum is σ = 509875624800. Its totient is φ = 64052771328.

The previous prime is 210031212211. The next prime is 210031212227. The reversal of 210031212222 is 222212130012.

210031212222 is a `hidden beast` number, since 210 + 0 + 312 + 122 + 22 = 666.

It is a super-2 number, since 2×210031212222² (a number of 23 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 210031212195 and 210031212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210031212227) 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, 929404 + ... + 1133072.

It is an arithmetic number, because the mean of its divisors is an integer number (5311204425).

Almost surely, 2^210031212222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210031212222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254937812400).

210031212222 is an abundant number, since it is smaller than the sum of its proper divisors (299844412578).

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

210031212222 is a wasteful number, since it uses less digits than its factorization.

210031212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203819 (or 203800 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 210031212222 its reverse (222212130012), we get a palindrome (432243342234).

The spelling of 210031212222 in words is "two hundred ten billion, thirty-one million, two hundred twelve thousand, two hundred twenty-two".