20101100220 has 108 divisors (see below), whose sum is σ = 64771152264. Its totient is φ = 5044968960.

The previous prime is 20101100209. The next prime is 20101100231. The reversal of 20101100220 is 2200110102.

It is an interprime number because it is at equal distance from previous prime (20101100209) and next prime (20101100231).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 141186 + ... + 245225.

Almost surely, 2^20101100220 is an apocalyptic number.

20101100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101100220 is an abundant number, since it is smaller than the sum of its proper divisors (44670052044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101100220 is a wasteful number, since it uses less digits than its factorization.

20101100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386460 (or 386438 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20101100220 its reverse (2200110102), we get a palindrome (22301210322).

The spelling of 20101100220 in words is "twenty billion, one hundred one million, one hundred thousand, two hundred twenty".