2101321131 has 64 divisors (see below), whose sum is σ = 3728256000. Its totient is φ = 1021579776.

The previous prime is 2101321111. The next prime is 2101321141. The reversal of 2101321131 is 1311231012.

It is a happy number.

It is not a de Polignac number, because 2101321131 - 2⁵ = 2101321099 is a prime.

It is a super-2 number, since 2×2101321131² = 8831100991174238322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2101321131.

It is not an unprimeable number, because it can be changed into a prime (2101321111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 186445 + ... + 197393.

It is an arithmetic number, because the mean of its divisors is an integer number (58254000).

Almost surely, 2^2101321131 is an apocalyptic number.

2101321131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2101321131 is a deficient number, since it is larger than the sum of its proper divisors (1626934869).

2101321131 is a wasteful number, since it uses less digits than its factorization.

2101321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11028.

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

The square root of 2101321131 is about 45840.1694041372. The cubic root of 2101321131 is about 1280.8476504126.

Adding to 2101321131 its reverse (1311231012), we get a palindrome (3412552143).

The spelling of 2101321131 in words is "two billion, one hundred one million, three hundred twenty-one thousand, one hundred thirty-one".