122002009 has 2 divisors, whose sum is σ = 122002010. Its totient is φ = 122002008.

The previous prime is 122001967. The next prime is 122002039. The reversal of 122002009 is 900200221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121881600 + 120409 = 11040^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 122002009 - 2¹¹ = 121999961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122001983 and 122002001.

It is not a weakly prime, because it can be changed into another prime (122002039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61001004 + 61001005.

It is an arithmetic number, because the mean of its divisors is an integer number (61001005).

Almost surely, 2^122002009 is an apocalyptic number.

It is an amenable number.

122002009 is a deficient number, since it is larger than the sum of its proper divisors (1).

122002009 is an equidigital number, since it uses as much as digits as its factorization.

122002009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 122002009 is about 11045.4519599698. The cubic root of 122002009 is about 495.9702887705.

The spelling of 122002009 in words is "one hundred twenty-two million, two thousand, nine".