121363565 has 4 divisors (see below), whose sum is σ = 145636284. Its totient is φ = 97090848.

The previous prime is 121363549. The next prime is 121363591. The reversal of 121363565 is 565363121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65577604 + 55785961 = 8098^2 + 7469^2 .

It is a cyclic number.

It is not a de Polignac number, because 121363565 - 2⁴ = 121363549 is a prime.

It is a super-2 number, since 2×121363565² = 29458229819018450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12136352 + ... + 12136361.

It is an arithmetic number, because the mean of its divisors is an integer number (36409071).

Almost surely, 2^121363565 is an apocalyptic number.

It is an amenable number.

121363565 is a deficient number, since it is larger than the sum of its proper divisors (24272719).

121363565 is an equidigital number, since it uses as much as digits as its factorization.

121363565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24272718.

The product of its digits is 16200, while the sum is 32.

The square root of 121363565 is about 11016.5132868798. The cubic root of 121363565 is about 495.1036275917.

The spelling of 121363565 in words is "one hundred twenty-one million, three hundred sixty-three thousand, five hundred sixty-five".