221103131 has 2 divisors, whose sum is σ = 221103132. Its totient is φ = 221103130.

The previous prime is 221103079. The next prime is 221103137. The reversal of 221103131 is 131301122.

221103131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221103131 is a prime.

It is a super-2 number, since 2×221103131² = 97773189076006322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221103137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551565 + 110551566.

It is an arithmetic number, because the mean of its divisors is an integer number (110551566).

Almost surely, 2^221103131 is an apocalyptic number.

221103131 is a deficient number, since it is larger than the sum of its proper divisors (1).

221103131 is an equidigital number, since it uses as much as digits as its factorization.

221103131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 221103131 is about 14869.5370136397. The cubic root of 221103131 is about 604.6883908597.

Adding to 221103131 its reverse (131301122), we get a palindrome (352404253).

The spelling of 221103131 in words is "two hundred twenty-one million, one hundred three thousand, one hundred thirty-one".