2131123001001 has 16 divisors (see below), whose sum is σ = 2877630873600. Its totient is φ = 1402683963408.

The previous prime is 2131123000999. The next prime is 2131123001003. The reversal of 2131123001001 is 1001003211312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2131123000999) and next prime (2131123001003).

It is not a de Polignac number, because 2131123001001 - 2¹ = 2131123000999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131123001003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4028010 + ... + 4526268.

It is an arithmetic number, because the mean of its divisors is an integer number (179851929600).

Almost surely, 2^{2131123001001} is an apocalyptic number.

It is an amenable number.

2131123001001 is a deficient number, since it is larger than the sum of its proper divisors (746507872599).

2131123001001 is a wasteful number, since it uses less digits than its factorization.

2131123001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516388.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 2131123001001 its reverse (1001003211312), we get a palindrome (3132126212313).

The spelling of 2131123001001 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-three million, one thousand, one".