2209070010781 has 2 divisors, whose sum is σ = 2209070010782. Its totient is φ = 2209070010780.

The previous prime is 2209070010779. The next prime is 2209070010809. The reversal of 2209070010781 is 1870100709022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1979733420900 + 229336589881 = 1407030^2 + 478891^2 .

It is a cyclic number.

It is not a de Polignac number, because 2209070010781 - 2¹ = 2209070010779 is a prime.

It is a super-2 number, since 2×2209070010781² (a number of 25 digits) contains 22 as substring.

Together with 2209070010779, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2209070010781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2209070040781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104535005390 + 1104535005391.

It is an arithmetic number, because the mean of its divisors is an integer number (1104535005391).

Almost surely, 2^{2209070010781} is an apocalyptic number.

It is an amenable number.

2209070010781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209070010781 is an equidigital number, since it uses as much as digits as its factorization.

2209070010781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 37.

The spelling of 2209070010781 in words is "two trillion, two hundred nine billion, seventy million, ten thousand, seven hundred eighty-one".