29121357271 has 4 divisors (see below), whose sum is σ = 29248525000. Its totient is φ = 28994189544.

The previous prime is 29121357269. The next prime is 29121357311. The reversal of 29121357271 is 17275312192.

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 29121357271 - 2¹ = 29121357269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29121357071) 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, 63583521 + ... + 63583978.

It is an arithmetic number, because the mean of its divisors is an integer number (7312131250).

Almost surely, 2^29121357271 is an apocalyptic number.

29121357271 is a deficient number, since it is larger than the sum of its proper divisors (127167729).

29121357271 is a wasteful number, since it uses less digits than its factorization.

29121357271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127167728.

The product of its digits is 52920, while the sum is 40.

The spelling of 29121357271 in words is "twenty-nine billion, one hundred twenty-one million, three hundred fifty-seven thousand, two hundred seventy-one".