220901121 has 16 divisors (see below), whose sum is σ = 374012800. Its totient is φ = 126229104.

The previous prime is 220901117. The next prime is 220901171. The reversal of 220901121 is 121109022.

It is not a de Polignac number, because 220901121 - 2² = 220901117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220901094 and 220901103.

It is not an unprimeable number, because it can be changed into a prime (220901171) 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, 584206 + ... + 584583.

It is an arithmetic number, because the mean of its divisors is an integer number (23375800).

Almost surely, 2^220901121 is an apocalyptic number.

220901121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220901121 is a deficient number, since it is larger than the sum of its proper divisors (153111679).

220901121 is a wasteful number, since it uses less digits than its factorization.

220901121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168805 (or 1168799 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 220901121 is about 14862.7427145867. The cubic root of 220901121 is about 604.5041776953.

The spelling of 220901121 in words is "two hundred twenty million, nine hundred one thousand, one hundred twenty-one".