121561067 has 4 divisors (see below), whose sum is σ = 128711736. Its totient is φ = 114410400.

The previous prime is 121561061. The next prime is 121561081. The reversal of 121561067 is 760165121.

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

It is a cyclic number.

It is not a de Polignac number, because 121561067 - 2⁸ = 121560811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121561061) 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, 3575309 + ... + 3575342.

It is an arithmetic number, because the mean of its divisors is an integer number (32177934).

Almost surely, 2^121561067 is an apocalyptic number.

121561067 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

121561067 is a deficient number, since it is larger than the sum of its proper divisors (7150669).

121561067 is an equidigital number, since it uses as much as digits as its factorization.

121561067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7150668.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 121561067 is about 11025.4735499207. The cubic root of 121561067 is about 495.3720523626.

The spelling of 121561067 in words is "one hundred twenty-one million, five hundred sixty-one thousand, sixty-seven".