84521121 has 4 divisors (see below), whose sum is σ = 112694832. Its totient is φ = 56347412.

The previous prime is 84521117. The next prime is 84521149. The reversal of 84521121 is 12112548.

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 84521121 - 2² = 84521117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84521091 and 84521100.

It is not an unprimeable number, because it can be changed into a prime (84521621) 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, 14086851 + ... + 14086856.

It is an arithmetic number, because the mean of its divisors is an integer number (28173708).

Almost surely, 2^84521121 is an apocalyptic number.

It is an amenable number.

84521121 is a deficient number, since it is larger than the sum of its proper divisors (28173711).

84521121 is a wasteful number, since it uses less digits than its factorization.

84521121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28173710.

The product of its digits is 640, while the sum is 24.

The square root of 84521121 is about 9193.5369145939. The cubic root of 84521121 is about 438.8557060588.

Adding to 84521121 its reverse (12112548), we get a palindrome (96633669).

The spelling of 84521121 in words is "eighty-four million, five hundred twenty-one thousand, one hundred twenty-one".