201220221131 has 2 divisors, whose sum is σ = 201220221132. Its totient is φ = 201220221130.

The previous prime is 201220221121. The next prime is 201220221173. The reversal of 201220221131 is 131122022102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201220221131 - 2²⁶ = 201153112267 is a prime.

It is a super-2 number, since 2×201220221131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201220221121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610110565 + 100610110566.

It is an arithmetic number, because the mean of its divisors is an integer number (100610110566).

Almost surely, 2^201220221131 is an apocalyptic number.

201220221131 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220221131 is an equidigital number, since it uses as much as digits as its factorization.

201220221131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 201220221131 its reverse (131122022102), we get a palindrome (332342243233).

The spelling of 201220221131 in words is "two hundred one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred thirty-one".