213020211222 has 192 divisors, whose sum is σ = 608776197120. Its totient is φ = 52285761792.

The previous prime is 213020211211. The next prime is 213020211251. The reversal of 213020211222 is 222112020312.

213020211222 is a `hidden beast` number, since 213 + 0 + 20 + 211 + 222 = 666.

It is a super-2 number, since 2×213020211222² (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 = 213020211195 and 213020211204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1317529 + ... + 1470347.

It is an arithmetic number, because the mean of its divisors is an integer number (3170709360).

Almost surely, 2^213020211222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213020211222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304388098560).

213020211222 is an abundant number, since it is smaller than the sum of its proper divisors (395755985898).

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

213020211222 is a wasteful number, since it uses less digits than its factorization.

213020211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152907 (or 152904 counting only the distinct ones).

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

Adding to 213020211222 its reverse (222112020312), we get a palindrome (435132231534).

The spelling of 213020211222 in words is "two hundred thirteen billion, twenty million, two hundred eleven thousand, two hundred twenty-two".