121023805 has 16 divisors (see below), whose sum is σ = 166408704. Its totient is φ = 82771200.

The previous prime is 121023803. The next prime is 121023821. The reversal of 121023805 is 508320121.

It is not a de Polignac number, because 121023805 - 2¹ = 121023803 is a prime.

It is a super-2 number, since 2×121023805² = 29293522753356050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121023803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9724 + ... + 18346.

It is an arithmetic number, because the mean of its divisors is an integer number (10400544).

Almost surely, 2^121023805 is an apocalyptic number.

It is an amenable number.

121023805 is a deficient number, since it is larger than the sum of its proper divisors (45384899).

121023805 is an equidigital number, since it uses as much as digits as its factorization.

121023805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 121023805 is about 11001.0819922406. The cubic root of 121023805 is about 494.6411779037.

Adding to 121023805 its reverse (508320121), we get a palindrome (629343926).

The spelling of 121023805 in words is "one hundred twenty-one million, twenty-three thousand, eight hundred five".