121602150581 has 2 divisors, whose sum is σ = 121602150582. Its totient is φ = 121602150580.

The previous prime is 121602150503. The next prime is 121602150601. The reversal of 121602150581 is 185051206121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117803400625 + 3798749956 = 343225^2 + 61634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121602150581 is a prime.

It is a super-2 number, since 2×121602150581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121602150181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60801075290 + 60801075291.

It is an arithmetic number, because the mean of its divisors is an integer number (60801075291).

Almost surely, 2^121602150581 is an apocalyptic number.

It is an amenable number.

121602150581 is a deficient number, since it is larger than the sum of its proper divisors (1).

121602150581 is an equidigital number, since it uses as much as digits as its factorization.

121602150581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 32.

The spelling of 121602150581 in words is "one hundred twenty-one billion, six hundred two million, one hundred fifty thousand, five hundred eighty-one".