121002542209 has 2 divisors, whose sum is σ = 121002542210. Its totient is φ = 121002542208.

The previous prime is 121002542201. The next prime is 121002542257. The reversal of 121002542209 is 902245200121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114233860225 + 6768681984 = 337985^2 + 82272^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002542209 - 2³ = 121002542201 is a prime.

It is not a weakly prime, because it can be changed into another prime (121002542201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501271104 + 60501271105.

It is an arithmetic number, because the mean of its divisors is an integer number (60501271105).

Almost surely, 2^121002542209 is an apocalyptic number.

It is an amenable number.

121002542209 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002542209 is an equidigital number, since it uses as much as digits as its factorization.

121002542209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 121002542209 in words is "one hundred twenty-one billion, two million, five hundred forty-two thousand, two hundred nine".