222021200121709 has 2 divisors, whose sum is σ = 222021200121710. Its totient is φ = 222021200121708.

The previous prime is 222021200121697. The next prime is 222021200121739. The reversal of 222021200121709 is 907121002120222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203417480002500 + 18603720119209 = 14262450^2 + 4313203^2 .

It is a cyclic number.

It is not a de Polignac number, because 222021200121709 - 2¹¹ = 222021200119661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222021200121739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111010600060854 + 111010600060855.

It is an arithmetic number, because the mean of its divisors is an integer number (111010600060855).

Almost surely, 2^{222021200121709} is an apocalyptic number.

It is an amenable number.

222021200121709 is a deficient number, since it is larger than the sum of its proper divisors (1).

222021200121709 is an equidigital number, since it uses as much as digits as its factorization.

222021200121709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 222021200121709 in words is "two hundred twenty-two trillion, twenty-one billion, two hundred million, one hundred twenty-one thousand, seven hundred nine".