212222000022221 has 16 divisors (see below), whose sum is σ = 253115325702144. Its totient is φ = 173974567653744.

The previous prime is 212222000022211. The next prime is 212222000022257. The reversal of 212222000022221 is 122220000222212.

It is a cyclic number.

It is not a de Polignac number, because 212222000022221 - 2¹⁸ = 212221999760077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212222000022193 and 212222000022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222000022211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78628541 + ... + 81282786.

It is an arithmetic number, because the mean of its divisors is an integer number (15819707856384).

Almost surely, 2^{212222000022221} is an apocalyptic number.

It is an amenable number.

212222000022221 is a deficient number, since it is larger than the sum of its proper divisors (40893325679923).

212222000022221 is a wasteful number, since it uses less digits than its factorization.

212222000022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159919600.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 212222000022221 its reverse (122220000222212), we get a palindrome (334442000244433).

It can be divided in two parts, 2 and 12222000022221, that multiplied together give a palindrome (24444000044442).

The spelling of 212222000022221 in words is "two hundred twelve trillion, two hundred twenty-two billion, twenty-two thousand, two hundred twenty-one".