10100011220 has 36 divisors (see below), whose sum is σ = 22967074620. Its totient is φ = 3729233664.

The previous prime is 10100011157. The next prime is 10100011223. The reversal of 10100011220 is 2211000101.

It can be written as a sum of positive squares in 6 ways, for example, as 179452816 + 9920558404 = 13396^2 + 99602^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10100011198 and 10100011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100011223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1490705 + ... + 1497464.

It is an arithmetic number, because the mean of its divisors is an integer number (637974295).

Almost surely, 2^10100011220 is an apocalyptic number.

10100011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10100011220 is an abundant number, since it is smaller than the sum of its proper divisors (12867063400).

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

10100011220 is a wasteful number, since it uses less digits than its factorization.

10100011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988204 (or 2988189 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 10100011220 its reverse (2211000101), we get a palindrome (12311011321).

The spelling of 10100011220 in words is "ten billion, one hundred million, eleven thousand, two hundred twenty".