220111111008101 has 2 divisors, whose sum is σ = 220111111008102. Its totient is φ = 220111111008100.

The previous prime is 220111111008083. The next prime is 220111111008121. The reversal of 220111111008101 is 101800111111022.

It is an a-pointer prime, because the next prime (220111111008121) can be obtained adding 220111111008101 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185473483888225 + 34637627119876 = 13618865^2 + 5885374^2 .

It is a cyclic number.

It is not a de Polignac number, because 220111111008101 - 2³⁸ = 219836233101157 is a prime.

It is a super-2 number, since 2×220111111008101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220111111008121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055555504050 + 110055555504051.

It is an arithmetic number, because the mean of its divisors is an integer number (110055555504051).

Almost surely, 2^{220111111008101} is an apocalyptic number.

It is an amenable number.

220111111008101 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111111008101 is an equidigital number, since it uses as much as digits as its factorization.

220111111008101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 20.

Adding to 220111111008101 its reverse (101800111111022), we get a palindrome (321911222119123).

The spelling of 220111111008101 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred eleven million, eight thousand, one hundred one".