1373140121671 has 4 divisors (see below), whose sum is σ = 1373455863000. Its totient is φ = 1372824380344.

The previous prime is 1373140121657. The next prime is 1373140121681. The reversal of 1373140121671 is 1761210413731.

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

It is a cyclic number.

It is not a de Polignac number, because 1373140121671 - 2⁷ = 1373140121543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1373140121671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373140121641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157864141 + ... + 157872838.

It is an arithmetic number, because the mean of its divisors is an integer number (343363965750).

Almost surely, 2^{1373140121671} is an apocalyptic number.

1373140121671 is a deficient number, since it is larger than the sum of its proper divisors (315741329).

1373140121671 is an equidigital number, since it uses as much as digits as its factorization.

1373140121671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315741328.

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 1373140121671 in words is "one trillion, three hundred seventy-three billion, one hundred forty million, one hundred twenty-one thousand, six hundred seventy-one".