210320221131 has 12 divisors (see below), whose sum is σ = 311205531000. Its totient is φ = 136793639520.

The previous prime is 210320221123. The next prime is 210320221157. The reversal of 210320221131 is 131122023012.

210320221131 is a `hidden beast` number, since 210 + 320 + 2 + 2 + 1 + 131 = 666.

It is not a de Polignac number, because 210320221131 - 2³ = 210320221123 is a prime.

It is a super-2 number, since 2×210320221131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210320291131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284986381 + ... + 284987118.

It is an arithmetic number, because the mean of its divisors is an integer number (25933794250).

Almost surely, 2^210320221131 is an apocalyptic number.

210320221131 is a deficient number, since it is larger than the sum of its proper divisors (100885309869).

210320221131 is a wasteful number, since it uses less digits than its factorization.

210320221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569973546 (or 569973543 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 210320221131 its reverse (131122023012), we get a palindrome (341442244143).

The spelling of 210320221131 in words is "two hundred ten billion, three hundred twenty million, two hundred twenty-one thousand, one hundred thirty-one".