4131220111 has 2 divisors, whose sum is σ = 4131220112. Its totient is φ = 4131220110.

The previous prime is 4131220081. The next prime is 4131220169. The reversal of 4131220111 is 1110221314.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4131220111 - 2²⁵ = 4097665679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4131220411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2065610055 + 2065610056.

It is an arithmetic number, because the mean of its divisors is an integer number (2065610056).

Almost surely, 2^4131220111 is an apocalyptic number.

4131220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

4131220111 is an equidigital number, since it uses as much as digits as its factorization.

4131220111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 4131220111 is about 64274.5681510191. The cubic root of 4131220111 is about 1604.5728700393.

Adding to 4131220111 its reverse (1110221314), we get a palindrome (5241441425).

The spelling of 4131220111 in words is "four billion, one hundred thirty-one million, two hundred twenty thousand, one hundred eleven".