2111020209049 has 2 divisors, whose sum is σ = 2111020209050. Its totient is φ = 2111020209048.

The previous prime is 2111020209047. The next prime is 2111020209107. The reversal of 2111020209049 is 9409020201112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2052471696025 + 58548513024 = 1432645^2 + 241968^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111020209049 - 2¹ = 2111020209047 is a prime.

It is a super-2 number, since 2×2111020209049² (a number of 25 digits) contains 22 as substring.

Together with 2111020209047, 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 2111020209049.

It is not a weakly prime, because it can be changed into another prime (2111020209041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055510104524 + 1055510104525.

It is an arithmetic number, because the mean of its divisors is an integer number (1055510104525).

Almost surely, 2^{2111020209049} is an apocalyptic number.

It is an amenable number.

2111020209049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111020209049 is an equidigital number, since it uses as much as digits as its factorization.

2111020209049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 2111020209049 in words is "two trillion, one hundred eleven billion, twenty million, two hundred nine thousand, forty-nine".