8019121 has 32 divisors (see below), whose sum is σ = 10177920. Its totient is φ = 6220800.

The previous prime is 8019119. The next prime is 8019131. The reversal of 8019121 is 1219108.

It is a 5-Lehmer number, since φ(8019121) divides (8019121-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 8019121 - 2¹ = 8019119 is a prime.

It is a super-2 number, since 2×8019121² = 128612603225282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8019092 and 8019101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8019131) 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 31 ways as a sum of consecutive naturals, for example, 131431 + ... + 131491.

It is an arithmetic number, because the mean of its divisors is an integer number (318060).

Almost surely, 2^8019121 is an apocalyptic number.

It is an amenable number.

8019121 is a deficient number, since it is larger than the sum of its proper divisors (2158799).

8019121 is a wasteful number, since it uses less digits than its factorization.

8019121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 8019121 is about 2831.8052546035. The cubic root of 8019121 is about 200.1592148861.

It can be divided in two parts, 8019 and 121, that multiplied together give a cube (970299 = 99³).

The spelling of 8019121 in words is "eight million, nineteen thousand, one hundred twenty-one".