101110021009 has 2 divisors, whose sum is σ = 101110021010. Its totient is φ = 101110021008.

The previous prime is 101110021003. The next prime is 101110021063. The reversal of 101110021009 is 900120011101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95292603025 + 5817417984 = 308695^2 + 76272^2 .

It is an emirp because it is prime and its reverse (900120011101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101110021009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101110020983 and 101110021001.

It is not a weakly prime, because it can be changed into another prime (101110021003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50555010504 + 50555010505.

It is an arithmetic number, because the mean of its divisors is an integer number (50555010505).

Almost surely, 2^101110021009 is an apocalyptic number.

It is an amenable number.

101110021009 is a deficient number, since it is larger than the sum of its proper divisors (1).

101110021009 is an equidigital number, since it uses as much as digits as its factorization.

101110021009 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 spelling of 101110021009 in words is "one hundred one billion, one hundred ten million, twenty-one thousand, nine".