1222022202221 has 2 divisors, whose sum is σ = 1222022202222. Its totient is φ = 1222022202220.

The previous prime is 1222022202197. The next prime is 1222022202251.

1222022202221 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 632104502500 + 589917699721 = 795050^2 + 768061^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222022202221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222022202193 and 1222022202202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222022202251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611011101110 + 611011101111.

It is an arithmetic number, because the mean of its divisors is an integer number (611011101111).

Almost surely, 2^{1222022202221} is an apocalyptic number.

It is an amenable number.

1222022202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222022202221 is an equidigital number, since it uses as much as digits as its factorization.

1222022202221 is an evil number, because the sum of its binary digits is even.

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

The spelling of 1222022202221 in words is "one trillion, two hundred twenty-two billion, twenty-two million, two hundred two thousand, two hundred twenty-one".