9219091220 has 48 divisors (see below), whose sum is σ = 19585238400. Its totient is φ = 3644889216.

The previous prime is 9219091187. The next prime is 9219091229. The reversal of 9219091220 is 221909129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9219091229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155806 + ... + 1163754.

It is an arithmetic number, because the mean of its divisors is an integer number (408025800).

Almost surely, 2^9219091220 is an apocalyptic number.

It is an amenable number.

9219091220 is an abundant number, since it is smaller than the sum of its proper divisors (10366147180).

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

9219091220 is a wasteful number, since it uses less digits than its factorization.

9219091220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8624 (or 8622 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 9219091220 is about 96016.0987543235. The cubic root of 9219091220 is about 2096.8275014379.

The spelling of 9219091220 in words is "nine billion, two hundred nineteen million, ninety-one thousand, two hundred twenty".