210221001131 has 16 divisors (see below), whose sum is σ = 235878531840. Its totient is φ = 186373125120.

The previous prime is 210221001091. The next prime is 210221001139. The reversal of 210221001131 is 131100122012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210221001131 is a prime.

It is a super-2 number, since 2×210221001131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210221001139) 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, 5179931 + ... + 5220356.

It is an arithmetic number, because the mean of its divisors is an integer number (14742408240).

Almost surely, 2^210221001131 is an apocalyptic number.

210221001131 is a deficient number, since it is larger than the sum of its proper divisors (25657530709).

210221001131 is a wasteful number, since it uses less digits than its factorization.

210221001131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10400374.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 210221001131 its reverse (131100122012), we get a palindrome (341321123143).

The spelling of 210221001131 in words is "two hundred ten billion, two hundred twenty-one million, one thousand, one hundred thirty-one".