91221345096 has 192 divisors, whose sum is σ = 281132208000. Its totient is φ = 24550364160.

The previous prime is 91221345079. The next prime is 91221345119. The reversal of 91221345096 is 69054312219.

It is a super-2 number, since 2×91221345096² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1365645 + ... + 1430883.

It is an arithmetic number, because the mean of its divisors is an integer number (1464230250).

Almost surely, 2^91221345096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91221345096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140566104000).

91221345096 is an abundant number, since it is smaller than the sum of its proper divisors (189910862904).

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

91221345096 is a wasteful number, since it uses less digits than its factorization.

91221345096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65332 (or 65321 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 91221345096 in words is "ninety-one billion, two hundred twenty-one million, three hundred forty-five thousand, ninety-six".