22212002111021 has 2 divisors, whose sum is σ = 22212002111022. Its totient is φ = 22212002111020.

The previous prime is 22212002110993. The next prime is 22212002111069. The reversal of 22212002111021 is 12011120021222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21298123470121 + 913878640900 = 4614989^2 + 955970^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212002111021 - 2⁴² = 17813955599917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212002111071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106001055510 + 11106001055511.

It is an arithmetic number, because the mean of its divisors is an integer number (11106001055511).

Almost surely, 2^{22212002111021} is an apocalyptic number.

It is an amenable number.

22212002111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212002111021 is an equidigital number, since it uses as much as digits as its factorization.

22212002111021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22212002111021 its reverse (12011120021222), we get a palindrome (34223122132243).

The spelling of 22212002111021 in words is "twenty-two trillion, two hundred twelve billion, two million, one hundred eleven thousand, twenty-one".