121641081 has 8 divisors (see below), whose sum is σ = 162397344. Its totient is φ = 80989440.

The previous prime is 121641077. The next prime is 121641083. The reversal of 121641081 is 180146121.

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

It is not a de Polignac number, because 121641081 - 2² = 121641077 is a prime.

It is a super-2 number, since 2×121641081² = 29593105173697122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121641083) 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 7 ways as a sum of consecutive naturals, for example, 23400 + ... + 28121.

It is an arithmetic number, because the mean of its divisors is an integer number (20299668).

Almost surely, 2^121641081 is an apocalyptic number.

It is an amenable number.

121641081 is a deficient number, since it is larger than the sum of its proper divisors (40756263).

121641081 is an equidigital number, since it uses as much as digits as its factorization.

121641081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52311.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 121641081 is about 11029.1015499904. The cubic root of 121641081 is about 495.4807165563.

The spelling of 121641081 in words is "one hundred twenty-one million, six hundred forty-one thousand, eighty-one".