1002111109 has 2 divisors, whose sum is σ = 1002111110. Its totient is φ = 1002111108.

The previous prime is 1002111107. The next prime is 1002111139. The reversal of 1002111109 is 9011112001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 992439009 + 9672100 = 31503^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002111109 - 2¹ = 1002111107 is a prime.

Together with 1002111107, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1002111092 and 1002111101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002111107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501055554 + 501055555.

It is an arithmetic number, because the mean of its divisors is an integer number (501055555).

Almost surely, 2^1002111109 is an apocalyptic number.

It is an amenable number.

1002111109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002111109 is an equidigital number, since it uses as much as digits as its factorization.

1002111109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 1002111109 is about 31656.1385674248. The cubic root of 1002111109 is about 1000.7032083821.

It can be divided in two parts, 100 and 2111109, that added together give a square (2111209 = 1453²).

The spelling of 1002111109 in words is "one billion, two million, one hundred eleven thousand, one hundred nine".