7121879428029 has 4 divisors (see below), whose sum is σ = 9495839237376. Its totient is φ = 4747919618684.

The previous prime is 7121879428021. The next prime is 7121879428043. The reversal of 7121879428029 is 9208249781217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7121879428029 - 2³ = 7121879428021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121879428021) 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, 1186979904669 + ... + 1186979904674.

It is an arithmetic number, because the mean of its divisors is an integer number (2373959809344).

Almost surely, 2^{7121879428029} is an apocalyptic number.

It is an amenable number.

7121879428029 is a deficient number, since it is larger than the sum of its proper divisors (2373959809347).

7121879428029 is a wasteful number, since it uses less digits than its factorization.

7121879428029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373959809346.

The product of its (nonzero) digits is 8128512, while the sum is 60.

The spelling of 7121879428029 in words is "seven trillion, one hundred twenty-one billion, eight hundred seventy-nine million, four hundred twenty-eight thousand, twenty-nine".