121011030209 has 2 divisors, whose sum is σ = 121011030210. Its totient is φ = 121011030208.

The previous prime is 121011030169. The next prime is 121011030221. The reversal of 121011030209 is 902030110121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102289949584 + 18721080625 = 319828^2 + 136825^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011030209 - 2¹² = 121011026113 is a prime.

It is not a weakly prime, because it can be changed into another prime (121071030209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505515104 + 60505515105.

It is an arithmetic number, because the mean of its divisors is an integer number (60505515105).

Almost surely, 2^121011030209 is an apocalyptic number.

It is an amenable number.

121011030209 is a deficient number, since it is larger than the sum of its proper divisors (1).

121011030209 is an equidigital number, since it uses as much as digits as its factorization.

121011030209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 121011030209 in words is "one hundred twenty-one billion, eleven million, thirty thousand, two hundred nine".