1201010009 has 2 divisors, whose sum is σ = 1201010010. Its totient is φ = 1201010008.

The previous prime is 1201010003. The next prime is 1201010093. The reversal of 1201010009 is 9000101021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800890000 + 400120009 = 28300^2 + 20003^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201010009 - 2²⁴ = 1184232793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201009975 and 1201010002.

It is not a weakly prime, because it can be changed into another prime (1201010003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600505004 + 600505005.

It is an arithmetic number, because the mean of its divisors is an integer number (600505005).

Almost surely, 2^1201010009 is an apocalyptic number.

It is an amenable number.

1201010009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201010009 is an equidigital number, since it uses as much as digits as its factorization.

1201010009 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 14.

The square root of 1201010009 is about 34655.5913093400. The cubic root of 1201010009 is about 1062.9566229987.

The spelling of 1201010009 in words is "one billion, two hundred one million, ten thousand, nine".