121822081 has 4 divisors (see below), whose sum is σ = 122007600. Its totient is φ = 121636564.

The previous prime is 121822067. The next prime is 121822159. The reversal of 121822081 is 180228121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180228121 = 109 ⋅1653469.

It is a cyclic number.

It is not a de Polignac number, because 121822081 - 2⁹ = 121821569 is a prime.

It is a super-2 number, since 2×121822081² = 29681238838341122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121822021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91771 + ... + 93088.

It is an arithmetic number, because the mean of its divisors is an integer number (30501900).

Almost surely, 2^121822081 is an apocalyptic number.

It is an amenable number.

121822081 is a deficient number, since it is larger than the sum of its proper divisors (185519).

121822081 is an equidigital number, since it uses as much as digits as its factorization.

121822081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185518.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 121822081 is about 11037.3040639461. The cubic root of 121822081 is about 495.7263505803.

The spelling of 121822081 in words is "one hundred twenty-one million, eight hundred twenty-two thousand, eighty-one".