2131101321 has 16 divisors (see below), whose sum is σ = 2989448448. Its totient is φ = 1348617600.

The previous prime is 2131101263. The next prime is 2131101359. The reversal of 2131101321 is 1231011312.

It is a happy number.

It is not a de Polignac number, because 2131101321 - 2⁹ = 2131100809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2131101321.

It is not an unprimeable number, because it can be changed into a prime (2131101821) 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, 229585 + ... + 238686.

It is an arithmetic number, because the mean of its divisors is an integer number (186840528).

Almost surely, 2^2131101321 is an apocalyptic number.

It is an amenable number.

2131101321 is a deficient number, since it is larger than the sum of its proper divisors (858347127).

2131101321 is a wasteful number, since it uses less digits than its factorization.

2131101321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468352.

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

The square root of 2131101321 is about 46163.8529696125. The cubic root of 2131101321 is about 1286.8700677646.

Adding to 2131101321 its reverse (1231011312), we get a palindrome (3362112633).

Subtracting from 2131101321 its reverse (1231011312), we obtain a palindrome (900090009).

The spelling of 2131101321 in words is "two billion, one hundred thirty-one million, one hundred one thousand, three hundred twenty-one".