1000001121 has 32 divisors (see below), whose sum is σ = 1552448256. Its totient is φ = 560736000.

The previous prime is 1000001099. The next prime is 1000001137. The reversal of 1000001121 is 1211000001.

It is not a de Polignac number, because 1000001121 - 2⁷ = 1000000993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000001161) 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 31 ways as a sum of consecutive naturals, for example, 846151 + ... + 847331.

It is an arithmetic number, because the mean of its divisors is an integer number (48514008).

Almost surely, 2^1000001121 is an apocalyptic number.

It is an amenable number.

1000001121 is a deficient number, since it is larger than the sum of its proper divisors (552447135).

1000001121 is a wasteful number, since it uses less digits than its factorization.

1000001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1000001121 is about 31622.7943262451. The cubic root of 1000001121 is about 1000.0003736665. Note that the first 3 decimals are identical.

Adding to 1000001121 its reverse (1211000001), we get a palindrome (2211001122).

It can be divided in two parts, 1000001 and 121, that multiplied together give a palindrome (121000121).

The spelling of 1000001121 in words is "one billion, one thousand, one hundred twenty-one".