212221223310 has 32 divisors (see below), whose sum is σ = 509352534432. Its totient is φ = 56589926400.

The previous prime is 212221223281. The next prime is 212221223327. The reversal of 212221223310 is 13322122212.

It is a super-2 number, since 2×212221223310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636942 + ... + 911118.

It is an arithmetic number, because the mean of its divisors is an integer number (15917266701).

Almost surely, 2^212221223310 is an apocalyptic number.

212221223310 is an abundant number, since it is smaller than the sum of its proper divisors (297131311122).

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

212221223310 is a wasteful number, since it uses less digits than its factorization.

212221223310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299988.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212221223310 its reverse (13322122212), we get a palindrome (225543345522).

The spelling of 212221223310 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-three thousand, three hundred ten".