91223122132220 has 96 divisors (see below), whose sum is σ = 206399851878528. Its totient is φ = 33666836493312.

The previous prime is 91223122132201. The next prime is 91223122132267. The reversal of 91223122132220 is 2223122132219.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8325550982 + ... + 8325561938.

It is an arithmetic number, because the mean of its divisors is an integer number (2149998457068).

Almost surely, 2^{91223122132220} is an apocalyptic number.

It is an amenable number.

91223122132220 is an abundant number, since it is smaller than the sum of its proper divisors (115176729746308).

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

91223122132220 is a wasteful number, since it uses less digits than its factorization.

91223122132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22839 (or 22837 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 91223122132220 its reverse (2223122132219), we get a palindrome (93446244264439).

The spelling of 91223122132220 in words is "ninety-one trillion, two hundred twenty-three billion, one hundred twenty-two million, one hundred thirty-two thousand, two hundred twenty".