212213221404 has 96 divisors (see below), whose sum is σ = 526742818560. Its totient is φ = 66306240000.

The previous prime is 212213221357. The next prime is 212213221421. The reversal of 212213221404 is 404122312212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55104079 + ... + 55107929.

It is an arithmetic number, because the mean of its divisors is an integer number (5486904360).

Almost surely, 2^212213221404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212213221404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263371409280).

212213221404 is an abundant number, since it is smaller than the sum of its proper divisors (314529597156).

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

212213221404 is a wasteful number, since it uses less digits than its factorization.

212213221404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371 (or 6369 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 212213221404 its reverse (404122312212), we get a palindrome (616335533616).

The spelling of 212213221404 in words is "two hundred twelve billion, two hundred thirteen million, two hundred twenty-one thousand, four hundred four".