47211121 has 4 divisors (see below), whose sum is σ = 47257600. Its totient is φ = 47164644.

The previous prime is 47211113. The next prime is 47211163. The reversal of 47211121 is 12111274.

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 47211121 - 2³ = 47211113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47214121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21681 + ... + 23758.

It is an arithmetic number, because the mean of its divisors is an integer number (11814400).

Almost surely, 2^47211121 is an apocalyptic number.

It is an amenable number.

47211121 is a deficient number, since it is larger than the sum of its proper divisors (46479).

47211121 is a wasteful number, since it uses less digits than its factorization.

47211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46478.

The product of its digits is 112, while the sum is 19.

The square root of 47211121 is about 6871.0349293247. The cubic root of 47211121 is about 361.4221548286.

Adding to 47211121 its reverse (12111274), we get a palindrome (59322395).

The spelling of 47211121 in words is "forty-seven million, two hundred eleven thousand, one hundred twenty-one".