201045121 has 4 divisors (see below), whose sum is σ = 202249152. Its totient is φ = 199841092.

The previous prime is 201045113. The next prime is 201045209. The reversal of 201045121 is 121540102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201045121 - 2³ = 201045113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201045095 and 201045104.

It is not an unprimeable number, because it can be changed into a prime (201045721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601765 + ... + 602098.

It is an arithmetic number, because the mean of its divisors is an integer number (50562288).

Almost surely, 2^201045121 is an apocalyptic number.

It is an amenable number.

201045121 is a deficient number, since it is larger than the sum of its proper divisors (1204031).

201045121 is a wasteful number, since it uses less digits than its factorization.

201045121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204030.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 201045121 is about 14179.0380844400. The cubic root of 201045121 is about 585.8204292012.

Adding to 201045121 its reverse (121540102), we get a palindrome (322585223).

The spelling of 201045121 in words is "two hundred one million, forty-five thousand, one hundred twenty-one".