220101112081 has 2 divisors, whose sum is σ = 220101112082. Its totient is φ = 220101112080.

The previous prime is 220101112079. The next prime is 220101112123. The reversal of 220101112081 is 180211101022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218813450625 + 1287661456 = 467775^2 + 35884^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101112081 - 2¹ = 220101112079 is a prime.

It is a super-2 number, since 2×220101112081² (a number of 23 digits) contains 22 as substring.

Together with 220101112079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (220101112181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110050556040 + 110050556041.

It is an arithmetic number, because the mean of its divisors is an integer number (110050556041).

Almost surely, 2^220101112081 is an apocalyptic number.

It is an amenable number.

220101112081 is a deficient number, since it is larger than the sum of its proper divisors (1).

220101112081 is an equidigital number, since it uses as much as digits as its factorization.

220101112081 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.

The spelling of 220101112081 in words is "two hundred twenty billion, one hundred one million, one hundred twelve thousand, eighty-one".