121201505 has 8 divisors (see below), whose sum is σ = 145545000. Its totient is φ = 96892416.

The previous prime is 121201489. The next prime is 121201519. The reversal of 121201505 is 505102121.

It can be written as a sum of positive squares in 4 ways, for example, as 399424 + 120802081 = 632^2 + 10991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121201505 - 2⁴ = 121201489 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80 + ... + 15569.

It is an arithmetic number, because the mean of its divisors is an integer number (18193125).

Almost surely, 2^121201505 is an apocalyptic number.

It is an amenable number.

121201505 is a deficient number, since it is larger than the sum of its proper divisors (24343495).

121201505 is a wasteful number, since it uses less digits than its factorization.

121201505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17203.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 121201505 is about 11009.1555080306. The cubic root of 121201505 is about 494.8831544088.

Adding to 121201505 its reverse (505102121), we get a palindrome (626303626).

The spelling of 121201505 in words is "one hundred twenty-one million, two hundred one thousand, five hundred five".