220101010101 has 160 divisors (see below), whose sum is σ = 391428998400. Its totient is φ = 123172866432.

The previous prime is 220101010099. The next prime is 220101010109. The reversal of 220101010101 is 101010101022.

It is a happy number.

It is not a de Polignac number, because 220101010101 - 2¹ = 220101010099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

220101010101 is a modest number, since divided by 1010101 gives 2201 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220101010109) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 590082951 + ... + 590083323.

It is an arithmetic number, because the mean of its divisors is an integer number (2446431240).

Almost surely, 2^220101010101 is an apocalyptic number.

220101010101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220101010101 is a deficient number, since it is larger than the sum of its proper divisors (171327988299).

220101010101 is an equidigital number, since it uses as much as digits as its factorization.

220101010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 220101010101 its reverse (101010101022), we get a palindrome (321111111123).

The spelling of 220101010101 in words is "two hundred twenty billion, one hundred one million, ten thousand, one hundred one".