121420133609 has 2 divisors, whose sum is σ = 121420133610. Its totient is φ = 121420133608.

The previous prime is 121420133603. The next prime is 121420133633. The reversal of 121420133609 is 906331024121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116027434384 + 5392699225 = 340628^2 + 73435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121420133609 is a prime.

It is a super-2 number, since 2×121420133609² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121420133603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60710066804 + 60710066805.

It is an arithmetic number, because the mean of its divisors is an integer number (60710066805).

Almost surely, 2^121420133609 is an apocalyptic number.

It is an amenable number.

121420133609 is a deficient number, since it is larger than the sum of its proper divisors (1).

121420133609 is an equidigital number, since it uses as much as digits as its factorization.

121420133609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 121420133609 in words is "one hundred twenty-one billion, four hundred twenty million, one hundred thirty-three thousand, six hundred nine".