9100681220 has 24 divisors (see below), whose sum is σ = 19156843608. Its totient is φ = 3631622400.

The previous prime is 9100681151. The next prime is 9100681223. The reversal of 9100681220 is 221860019.

It can be written as a sum of positive squares in 4 ways, for example, as 1300612096 + 7800069124 = 36064^2 + 88318^2 .

It is not an unprimeable number, because it can be changed into a prime (9100681223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532001 + ... + 548840.

It is an arithmetic number, because the mean of its divisors is an integer number (798201817).

Almost surely, 2^9100681220 is an apocalyptic number.

It is an amenable number.

9100681220 is an abundant number, since it is smaller than the sum of its proper divisors (10056162388).

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

9100681220 is a wasteful number, since it uses less digits than its factorization.

9100681220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081271 (or 1081269 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 9100681220 is about 95397.4906378569. The cubic root of 9100681220 is about 2087.8115734629.

The spelling of 9100681220 in words is "nine billion, one hundred million, six hundred eighty-one thousand, two hundred twenty".