120021004009 has 2 divisors, whose sum is σ = 120021004010. Its totient is φ = 120021004008.

The previous prime is 120021003967. The next prime is 120021004013. The reversal of 120021004009 is 900400120021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119743681600 + 277322409 = 346040^2 + 16653^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021004009 - 2⁷ = 120021003881 is a prime.

It is not a weakly prime, because it can be changed into another prime (120001004009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010502004 + 60010502005.

It is an arithmetic number, because the mean of its divisors is an integer number (60010502005).

Almost surely, 2^120021004009 is an apocalyptic number.

It is an amenable number.

120021004009 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021004009 is an equidigital number, since it uses as much as digits as its factorization.

120021004009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 120021004009 in words is "one hundred twenty billion, twenty-one million, four thousand, nine".