220111128001 has 2 divisors, whose sum is σ = 220111128002. Its totient is φ = 220111128000.

The previous prime is 220111127993. The next prime is 220111128037. The reversal of 220111128001 is 100821111022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196647015601 + 23464112400 = 443449^2 + 153180^2 .

It is a cyclic number.

It is not a de Polignac number, because 220111128001 - 2³ = 220111127993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220111128001.

It is not a weakly prime, because it can be changed into another prime (220121128001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055564000 + 110055564001.

It is an arithmetic number, because the mean of its divisors is an integer number (110055564001).

Almost surely, 2^220111128001 is an apocalyptic number.

It is an amenable number.

220111128001 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111128001 is an equidigital number, since it uses as much as digits as its factorization.

220111128001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 220111128001 its reverse (100821111022), we get a palindrome (320932239023).

The spelling of 220111128001 in words is "two hundred twenty billion, one hundred eleven million, one hundred twenty-eight thousand, one".