19371047121 has 6 divisors (see below), whose sum is σ = 27980401410. Its totient is φ = 12914031408.

The previous prime is 19371047099. The next prime is 19371047123. The reversal of 19371047121 is 12174017391.

It can be written as a sum of positive squares in only one way, i.e., 12196110096 + 7174937025 = 110436^2 + 84705^2 .

It is not a de Polignac number, because 19371047121 - 2⁷ = 19371046993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19371047123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1076169276 + ... + 1076169293.

It is an arithmetic number, because the mean of its divisors is an integer number (4663400235).

Almost surely, 2^19371047121 is an apocalyptic number.

It is an amenable number.

19371047121 is a deficient number, since it is larger than the sum of its proper divisors (8609354289).

19371047121 is a wasteful number, since it uses less digits than its factorization.

19371047121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152338575 (or 2152338572 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The spelling of 19371047121 in words is "nineteen billion, three hundred seventy-one million, forty-seven thousand, one hundred twenty-one".