222112120002021 has 12 divisors (see below), whose sum is σ = 320996327485548. Its totient is φ = 147997342188864.

The previous prime is 222112120002013. The next prime is 222112120002077. The reversal of 222112120002021 is 120200021211222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 211317682032900 + 10794437969121 = 14536770^2 + 3285489^2 .

It is not a de Polignac number, because 222112120002021 - 2³ = 222112120002013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222112120001985 and 222112120002003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222112120052021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6450355090 + ... + 6450389523.

It is an arithmetic number, because the mean of its divisors is an integer number (26749693957129).

Almost surely, 2^{222112120002021} is an apocalyptic number.

It is an amenable number.

222112120002021 is a deficient number, since it is larger than the sum of its proper divisors (98884207483527).

222112120002021 is a wasteful number, since it uses less digits than its factorization.

222112120002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12900746532 (or 12900746529 counting only the distinct ones).

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

Adding to 222112120002021 its reverse (120200021211222), we get a palindrome (342312141213243).

The spelling of 222112120002021 in words is "two hundred twenty-two trillion, one hundred twelve billion, one hundred twenty million, two thousand, twenty-one".