121085567 has 4 divisors (see below), whose sum is σ = 122284536. Its totient is φ = 119886600.

The previous prime is 121085563. The next prime is 121085579. The reversal of 121085567 is 765580121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765580121 = 241 ⋅3176681.

It is a cyclic number.

It is not a de Polignac number, because 121085567 - 2² = 121085563 is a prime.

It is a super-2 number, since 2×121085567² = 29323429071422978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121085563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599333 + ... + 599534.

It is an arithmetic number, because the mean of its divisors is an integer number (30571134).

Almost surely, 2^121085567 is an apocalyptic number.

121085567 is a deficient number, since it is larger than the sum of its proper divisors (1198969).

121085567 is a wasteful number, since it uses less digits than its factorization.

121085567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198968.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 121085567 is about 11003.8887217202. Note that the first 3 decimals coincide. The cubic root of 121085567 is about 494.7253068981.

The spelling of 121085567 in words is "one hundred twenty-one million, eighty-five thousand, five hundred sixty-seven".