2018121 has 16 divisors (see below), whose sum is σ = 3256704. Its totient is φ = 1085184.

The previous prime is 2018117. The next prime is 2018153. The reversal of 2018121 is 1218102.

It is not a de Polignac number, because 2018121 - 2² = 2018117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2018121.

It is not an unprimeable number, because it can be changed into a prime (2018111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2470 + ... + 3183.

It is an arithmetic number, because the mean of its divisors is an integer number (203544).

2^2018121 is an apocalyptic number.

2018121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2018121 is a deficient number, since it is larger than the sum of its proper divisors (1238583).

2018121 is a wasteful number, since it uses less digits than its factorization.

2018121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2018121 is about 1420.6058566682. The cubic root of 2018121 is about 126.3714786701.

It can be divided in two parts, 20181 and 21, that multiplied together give a square (423801 = 651²).

The spelling of 2018121 in words is "two million, eighteen thousand, one hundred twenty-one".