212202211122 has 48 divisors (see below), whose sum is σ = 505714116960. Its totient is φ = 64303693080.

The previous prime is 212202211103. The next prime is 212202211159. The reversal of 212202211122 is 221112202212.

It is a happy number.

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 = 212202211095 and 212202211104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4404672 + ... + 4452587.

It is an arithmetic number, because the mean of its divisors is an integer number (10535710770).

Almost surely, 2^212202211122 is an apocalyptic number.

212202211122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212202211122 is an abundant number, since it is smaller than the sum of its proper divisors (293511905838).

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

212202211122 is a wasteful number, since it uses less digits than its factorization.

212202211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8857300 (or 8857275 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212202211122 its reverse (221112202212), we get a palindrome (433314413334).

It can be divided in two parts, 212202 and 211122, that added together give a palindrome (423324).

The spelling of 212202211122 in words is "two hundred twelve billion, two hundred two million, two hundred eleven thousand, one hundred twenty-two".