1091211596340 has 96 divisors (see below), whose sum is σ = 3070535852160. Its totient is φ = 289548134400.

The previous prime is 1091211596297. The next prime is 1091211596393. The reversal of 1091211596340 is 436951121901.

It is a super-2 number, since 2×1091211596340² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1091211596292 and 1091211596301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109896496 + ... + 109906424.

It is an arithmetic number, because the mean of its divisors is an integer number (31984748460).

Almost surely, 2^{1091211596340} is an apocalyptic number.

1091211596340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1091211596340 is an abundant number, since it is smaller than the sum of its proper divisors (1979324255820).

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

1091211596340 is a wasteful number, since it uses less digits than its factorization.

1091211596340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18833 (or 18831 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 1091211596340 in words is "one trillion, ninety-one billion, two hundred eleven million, five hundred ninety-six thousand, three hundred forty".