212211122202 has 48 divisors (see below), whose sum is σ = 466183741608. Its totient is φ = 69753899520.

The previous prime is 212211122177. The next prime is 212211122209. The reversal of 212211122202 is 202221112212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 61355785401 + 150855336801 = 247701^2 + 388401^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (212211122209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7940302 + ... + 7966982.

Almost surely, 2^212211122202 is an apocalyptic number.

212211122202 is an abundant number, since it is smaller than the sum of its proper divisors (253972619406).

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

212211122202 is a wasteful number, since it uses less digits than its factorization.

212211122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32815 (or 32812 counting only the distinct ones).

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

Adding to 212211122202 its reverse (202221112212), we get a palindrome (414432234414).

The spelling of 212211122202 in words is "two hundred twelve billion, two hundred eleven million, one hundred twenty-two thousand, two hundred two".