2131120221 has 8 divisors (see below), whose sum is σ = 3008640384. Its totient is φ = 1337173440.

The previous prime is 2131120163. The next prime is 2131120249. The reversal of 2131120221 is 1220211312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2131120221 - 2⁷ = 2131120093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2131120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20893285 + ... + 20893386.

It is an arithmetic number, because the mean of its divisors is an integer number (376080048).

Almost surely, 2^2131120221 is an apocalyptic number.

It is an amenable number.

2131120221 is a deficient number, since it is larger than the sum of its proper divisors (877520163).

2131120221 is a wasteful number, since it uses less digits than its factorization.

2131120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41786691.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2131120221 is about 46164.0576747755. The cubic root of 2131120221 is about 1286.8738720217.

Adding to 2131120221 its reverse (1220211312), we get a palindrome (3351331533).

The spelling of 2131120221 in words is "two billion, one hundred thirty-one million, one hundred twenty thousand, two hundred twenty-one".