12100010021009 has 2 divisors, whose sum is σ = 12100010021010. Its totient is φ = 12100010021008.

The previous prime is 12100010021003. The next prime is 12100010021059. The reversal of 12100010021009 is 90012001000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8863958017600 + 3236052003409 = 2977240^2 + 1798903^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100010021009 - 2²⁰ = 12100008972433 is a prime.

It is not a weakly prime, because it can be changed into another prime (12100010021003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050005010504 + 6050005010505.

It is an arithmetic number, because the mean of its divisors is an integer number (6050005010505).

Almost surely, 2^{12100010021009} is an apocalyptic number.

It is an amenable number.

12100010021009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100010021009 is an equidigital number, since it uses as much as digits as its factorization.

12100010021009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 12100010021009 in words is "twelve trillion, one hundred billion, ten million, twenty-one thousand, nine".