921200121002129 has 8 divisors (see below), whose sum is σ = 921833740803360. Its totient is φ = 920566517978016.

The previous prime is 921200121002099. The next prime is 921200121002141.

921200121002129 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 921200121002129 - 2³² = 921195826034833 is a prime.

It is a super-2 number, since 2×921200121002129² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 921200121002095 and 921200121002104.

It is not an unprimeable number, because it can be changed into a prime (921200721002129) 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, 106666934 + ... + 114979280.

It is an arithmetic number, because the mean of its divisors is an integer number (115229217600420).

Almost surely, 2^{921200121002129} is an apocalyptic number.

It is an amenable number.

921200121002129 is a deficient number, since it is larger than the sum of its proper divisors (633619801231).

921200121002129 is a wasteful number, since it uses less digits than its factorization.

921200121002129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8388559.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 921200121002129 in words is "nine hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, two thousand, one hundred twenty-nine".