121122001 has 16 divisors (see below), whose sum is σ = 162626688. Its totient is φ = 87120000.

The previous prime is 121121981. The next prime is 121122007. The reversal of 121122001 is 100221121.

It is not a de Polignac number, because 121122001 - 2⁷ = 121121873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121122007) 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 15 ways as a sum of consecutive naturals, for example, 59500 + ... + 61501.

It is an arithmetic number, because the mean of its divisors is an integer number (10164168).

Almost surely, 2^121122001 is an apocalyptic number.

121122001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121122001 is a deficient number, since it is larger than the sum of its proper divisors (41504687).

121122001 is a wasteful number, since it uses less digits than its factorization.

121122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121032.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121122001 is about 11005.5441028602. The cubic root of 121122001 is about 494.7749219891.

Adding to 121122001 its reverse (100221121), we get a palindrome (221343122).

The spelling of 121122001 in words is "one hundred twenty-one million, one hundred twenty-two thousand, one".