222121030212 has 36 divisors (see below), whose sum is σ = 561486949296. Its totient is φ = 74038451760.

The previous prime is 222121030199. The next prime is 222121030237. The reversal of 222121030212 is 212030121222.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2560387 + ... + 2645717.

Almost surely, 2^222121030212 is an apocalyptic number.

It is an amenable number.

222121030212 is an abundant number, since it is smaller than the sum of its proper divisors (339365919084).

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

222121030212 is a wasteful number, since it uses less digits than its factorization.

222121030212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157648 (or 157643 counting only the distinct ones).

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

Adding to 222121030212 its reverse (212030121222), we get a palindrome (434151151434).

The spelling of 222121030212 in words is "two hundred twenty-two billion, one hundred twenty-one million, thirty thousand, two hundred twelve".