222210012120221 has 2 divisors, whose sum is σ = 222210012120222. Its totient is φ = 222210012120220.

The previous prime is 222210012120133. The next prime is 222210012120233. The reversal of 222210012120221 is 122021210012222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114753692659225 + 107456319460996 = 10712315^2 + 10366114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222210012120221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222210012120193 and 222210012120202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222210012120281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111105006060110 + 111105006060111.

It is an arithmetic number, because the mean of its divisors is an integer number (111105006060111).

Almost surely, 2^{222210012120221} is an apocalyptic number.

It is an amenable number.

222210012120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222210012120221 is an equidigital number, since it uses as much as digits as its factorization.

222210012120221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222210012120221 its reverse (122021210012222), we get a palindrome (344231222132443).

The spelling of 222210012120221 in words is "two hundred twenty-two trillion, two hundred ten billion, twelve million, one hundred twenty thousand, two hundred twenty-one".