129224422921 has 8 divisors (see below), whose sum is σ = 140976698688. Its totient is φ = 117472914000.

The previous prime is 129224422903. The next prime is 129224422937.

129224422921 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129224422921 - 2¹⁵ = 129224390153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129224420921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194476 + ... + 544306.

It is an arithmetic number, because the mean of its divisors is an integer number (17622087336).

Almost surely, 2^129224422921 is an apocalyptic number.

129224422921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129224422921 is a deficient number, since it is larger than the sum of its proper divisors (11752275767).

129224422921 is a wasteful number, since it uses less digits than its factorization.

129224422921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383423.

The product of its digits is 82944, while the sum is 40.

The spelling of 129224422921 in words is "one hundred twenty-nine billion, two hundred twenty-four million, four hundred twenty-two thousand, nine hundred twenty-one".