121901121 has 12 divisors (see below), whose sum is σ = 176402772. Its totient is φ = 81118176.

The previous prime is 121901071. The next prime is 121901183. The reversal of 121901121 is 121109121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43046721 + 78854400 = 6561^2 + 8880^2 .

It is not a de Polignac number, because 121901121 - 2⁶ = 121901057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121901094 and 121901103.

It is not an unprimeable number, because it can be changed into a prime (121901621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7146 + ... + 17171.

It is an arithmetic number, because the mean of its divisors is an integer number (14700231).

Almost surely, 2^121901121 is an apocalyptic number.

It is an amenable number.

121901121 is a deficient number, since it is larger than the sum of its proper divisors (54501651).

121901121 is a wasteful number, since it uses less digits than its factorization.

121901121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24880 (or 24877 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 121901121 is about 11040.8840678634. The cubic root of 121901121 is about 495.8335389747.

The spelling of 121901121 in words is "one hundred twenty-one million, nine hundred one thousand, one hundred twenty-one".