121167881 has 4 divisors (see below), whose sum is σ = 121203012. Its totient is φ = 121132752.

The previous prime is 121167877. The next prime is 121167901. The reversal of 121167881 is 188761121.

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 52128400 + 69039481 = 7220^2 + 8309^2 .

It is a cyclic number.

It is not a de Polignac number, because 121167881 - 2² = 121167877 is a prime.

It is a super-2 number, since 2×121167881² = 29363310772060322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121167281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11750 + ... + 19503.

It is an arithmetic number, because the mean of its divisors is an integer number (30300753).

Almost surely, 2^121167881 is an apocalyptic number.

It is an amenable number.

121167881 is a deficient number, since it is larger than the sum of its proper divisors (35131).

121167881 is an equidigital number, since it uses as much as digits as its factorization.

121167881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35130.

The product of its digits is 5376, while the sum is 35.

The square root of 121167881 is about 11007.6283094952. The cubic root of 121167881 is about 494.8373863022.

The spelling of 121167881 in words is "one hundred twenty-one million, one hundred sixty-seven thousand, eight hundred eighty-one".