121465109 has 2 divisors, whose sum is σ = 121465110. Its totient is φ = 121465108.

The previous prime is 121465087. The next prime is 121465147. The reversal of 121465109 is 901564121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83210884 + 38254225 = 9122^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 121465109 - 2¹² = 121461013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121465189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60732554 + 60732555.

It is an arithmetic number, because the mean of its divisors is an integer number (60732555).

Almost surely, 2^121465109 is an apocalyptic number.

It is an amenable number.

121465109 is a deficient number, since it is larger than the sum of its proper divisors (1).

121465109 is an equidigital number, since it uses as much as digits as its factorization.

121465109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 121465109 is about 11021.1210409831. The cubic root of 121465109 is about 495.2416722834.

The spelling of 121465109 in words is "one hundred twenty-one million, four hundred sixty-five thousand, one hundred nine".