29799822921 has 16 divisors (see below), whose sum is σ = 43350424320. Its totient is φ = 18058320720.

The previous prime is 29799822917. The next prime is 29799822947. The reversal of 29799822921 is 12922899792.

It is not a de Polignac number, because 29799822921 - 2² = 29799822917 is a prime.

It is a super-2 number, since 2×29799822921² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29799822901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248490 + ... + 348348.

It is an arithmetic number, because the mean of its divisors is an integer number (2709401520).

Almost surely, 2^29799822921 is an apocalyptic number.

It is an amenable number.

29799822921 is a deficient number, since it is larger than the sum of its proper divisors (13550601399).

29799822921 is a wasteful number, since it uses less digits than its factorization.

29799822921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108916.

The product of its digits is 5878656, while the sum is 60.

It can be divided in two parts, 2979982 and 2921, that added together give a triangular number (2982903 = T₂₄₄₂).

The spelling of 29799822921 in words is "twenty-nine billion, seven hundred ninety-nine million, eight hundred twenty-two thousand, nine hundred twenty-one".