212220222536 has 64 divisors (see below), whose sum is σ = 462201820800. Its totient is φ = 89466550272.

The previous prime is 212220222527. The next prime is 212220222541. The reversal of 212220222536 is 635222022212.

It is a junction number, because it is equal to n+sod(n) for n = 212220222499 and 212220222508.

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, 2620280 + ... + 2700056.

It is an arithmetic number, because the mean of its divisors is an integer number (7221903450).

Almost surely, 2^212220222536 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 212220222536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231100910400).

212220222536 is an abundant number, since it is smaller than the sum of its proper divisors (249981598264).

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

212220222536 is a wasteful number, since it uses less digits than its factorization.

212220222536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80566 (or 80562 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 212220222536 its reverse (635222022212), we get a palindrome (847442244748).

The spelling of 212220222536 in words is "two hundred twelve billion, two hundred twenty million, two hundred twenty-two thousand, five hundred thirty-six".