29891484904221 has 12 divisors (see below), whose sum is σ = 43178049987072. Its totient is φ = 19926982442376.

The previous prime is 29891484904219. The next prime is 29891484904247. The reversal of 29891484904221 is 12240948419892.

29891484904221 is a `hidden beast` number, since 2 + 9 + 8 + 9 + 1 + 484 + 90 + 42 + 21 = 666.

It is not a de Polignac number, because 29891484904221 - 2¹ = 29891484904219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29891484904271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55899151 + ... + 56431356.

It is an arithmetic number, because the mean of its divisors is an integer number (3598170832256).

Almost surely, 2^{29891484904221} is an apocalyptic number.

It is an amenable number.

29891484904221 is a deficient number, since it is larger than the sum of its proper divisors (13286565082851).

29891484904221 is a wasteful number, since it uses less digits than its factorization.

29891484904221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112360080 (or 112360077 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 29891484904221 in words is "twenty-nine trillion, eight hundred ninety-one billion, four hundred eighty-four million, nine hundred four thousand, two hundred twenty-one".