2919121109393 has 4 divisors (see below), whose sum is σ = 2974198866228. Its totient is φ = 2864043352560.

The previous prime is 2919121109363. The next prime is 2919121109417. The reversal of 2919121109393 is 3939011219192.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2106512612689 + 812608496704 = 1451383^2 + 901448^2 .

It is a cyclic number.

It is not a de Polignac number, because 2919121109393 - 2⁸ = 2919121109137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2919121109363) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 27538878338 + ... + 27538878443.

It is an arithmetic number, because the mean of its divisors is an integer number (743549716557).

Almost surely, 2^{2919121109393} is an apocalyptic number.

It is an amenable number.

2919121109393 is a deficient number, since it is larger than the sum of its proper divisors (55077756835).

2919121109393 is an equidigital number, since it uses as much as digits as its factorization.

2919121109393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55077756834.

The product of its (nonzero) digits is 236196, while the sum is 50.

The spelling of 2919121109393 in words is "two trillion, nine hundred nineteen billion, one hundred twenty-one million, one hundred nine thousand, three hundred ninety-three".