29121929870 has 16 divisors (see below), whose sum is σ = 57184880688. Its totient is φ = 10589792640.

The previous prime is 29121929861. The next prime is 29121929873. The reversal of 29121929870 is 7892912192.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29121929873) 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 7 ways as a sum of consecutive naturals, for example, 132372299 + ... + 132372518.

It is an arithmetic number, because the mean of its divisors is an integer number (3574055043).

Almost surely, 2^29121929870 is an apocalyptic number.

29121929870 is a deficient number, since it is larger than the sum of its proper divisors (28062950818).

29121929870 is a wasteful number, since it uses less digits than its factorization.

29121929870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264744835.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 29121929870 in words is "twenty-nine billion, one hundred twenty-one million, nine hundred twenty-nine thousand, eight hundred seventy".