29121929869 has 16 divisors (see below), whose sum is σ = 31378547200. Its totient is φ = 26938151856.

The previous prime is 29121929861. The next prime is 29121929873. The reversal of 29121929869 is 96892912192.

It is a cyclic number.

It is not a de Polignac number, because 29121929869 - 2³ = 29121929861 is a prime.

It is a super-2 number, since 2×29121929869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29121929861) 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 15 ways as a sum of consecutive naturals, for example, 3609562 + ... + 3617620.

It is an arithmetic number, because the mean of its divisors is an integer number (1961159200).

Almost surely, 2^29121929869 is an apocalyptic number.

It is an amenable number.

29121929869 is a deficient number, since it is larger than the sum of its proper divisors (2256617331).

29121929869 is a wasteful number, since it uses less digits than its factorization.

29121929869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12544.

The product of its digits is 2519424, while the sum is 58.

The spelling of 29121929869 in words is "twenty-nine billion, one hundred twenty-one million, nine hundred twenty-nine thousand, eight hundred sixty-nine".