812121002222 has 8 divisors (see below), whose sum is σ = 1221796286256. Its totient is φ = 404855573472.

The previous prime is 812121002219. The next prime is 812121002269. The reversal of 812121002222 is 222200121218.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602462978 + ... + 602464325.

It is an arithmetic number, because the mean of its divisors is an integer number (152724535782).

Almost surely, 2^812121002222 is an apocalyptic number.

812121002222 is a deficient number, since it is larger than the sum of its proper divisors (409675284034).

812121002222 is a wasteful number, since it uses less digits than its factorization.

812121002222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204927642.

The product of its (nonzero) digits is 512, while the sum is 23.

The spelling of 812121002222 in words is "eight hundred twelve billion, one hundred twenty-one million, two thousand, two hundred twenty-two".