2131123201 has 16 divisors (see below), whose sum is σ = 2269590400. Its totient is φ = 1995383808.

The previous prime is 2131123199. The next prime is 2131123207. The reversal of 2131123201 is 1023211312.

It is a cyclic number.

It is not a de Polignac number, because 2131123201 - 2¹ = 2131123199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131123207) 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, 1007521 + ... + 1009633.

It is an arithmetic number, because the mean of its divisors is an integer number (141849400).

Almost surely, 2^2131123201 is an apocalyptic number.

It is an amenable number.

2131123201 is a deficient number, since it is larger than the sum of its proper divisors (138467199).

2131123201 is a wasteful number, since it uses less digits than its factorization.

2131123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2131123201 is about 46164.0899509565. The cubic root of 2131123201 is about 1286.8744718443.

Adding to 2131123201 its reverse (1023211312), we get a palindrome (3154334513).

The spelling of 2131123201 in words is "two billion, one hundred thirty-one million, one hundred twenty-three thousand, two hundred one".