853121121 has 8 divisors (see below), whose sum is σ = 1137907680. Its totient is φ = 568540992.

The previous prime is 853121119. The next prime is 853121123. The reversal of 853121121 is 121121358.

It is an interprime number because it is at equal distance from previous prime (853121119) and next prime (853121123).

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

It is not a de Polignac number, because 853121121 - 2¹ = 853121119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 853121091 and 853121100.

It is not an unprimeable number, because it can be changed into a prime (853121123) 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, 41691 + ... + 58688.

It is an arithmetic number, because the mean of its divisors is an integer number (142238460).

Almost surely, 2^853121121 is an apocalyptic number.

It is an amenable number.

853121121 is a deficient number, since it is larger than the sum of its proper divisors (284786559).

853121121 is a wasteful number, since it uses less digits than its factorization.

853121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103215.

The product of its digits is 480, while the sum is 24.

The square root of 853121121 is about 29208.2372114443. The cubic root of 853121121 is about 948.4262479466.

Adding to 853121121 its reverse (121121358), we get a palindrome (974242479).

The spelling of 853121121 in words is "eight hundred fifty-three million, one hundred twenty-one thousand, one hundred twenty-one".