211121020022009 has 2 divisors, whose sum is σ = 211121020022010. Its totient is φ = 211121020022008.

The previous prime is 211121020021981. The next prime is 211121020022039. The reversal of 211121020022009 is 900220020121112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191294901283600 + 19826118738409 = 13830940^2 + 4452653^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121020022009 - 2¹² = 211121020017913 is a prime.

It is not a weakly prime, because it can be changed into another prime (211121020022039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560510011004 + 105560510011005.

It is an arithmetic number, because the mean of its divisors is an integer number (105560510011005).

Almost surely, 2^{211121020022009} is an apocalyptic number.

It is an amenable number.

211121020022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121020022009 is an equidigital number, since it uses as much as digits as its factorization.

211121020022009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 211121020022009 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty million, twenty-two thousand, nine".