1091919191922 has 24 divisors (see below), whose sum is σ = 2547811448364. Its totient is φ = 335975135904.

The previous prime is 1091919191921. The next prime is 1091919191929. The reversal of 1091919191922 is 2291919191901.

It can be written as a sum of positive squares in 2 ways, for example, as 1087538208201 + 4380983721 = 1042851^2 + 66189^2 .

It is a super-3 number, since 3×1091919191922³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1091919191921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2333160433 + ... + 2333160900.

Almost surely, 2^{1091919191922} is an apocalyptic number.

1091919191922 is an abundant number, since it is smaller than the sum of its proper divisors (1455892256442).

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

1091919191922 is a wasteful number, since it uses less digits than its factorization.

1091919191922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4666321354 (or 4666321351 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 54.

The spelling of 1091919191922 in words is "one trillion, ninety-one billion, nine hundred nineteen million, one hundred ninety-one thousand, nine hundred twenty-two".