2121164231145 has 8 divisors (see below), whose sum is σ = 3393862769856. Its totient is φ = 1131287589936.

The previous prime is 2121164231113. The next prime is 2121164231159. The reversal of 2121164231145 is 5411324611212.

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

It is not a de Polignac number, because 2121164231145 - 2⁵ = 2121164231113 is a prime.

It is a super-2 number, since 2×2121164231145² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70705474357 + ... + 70705474386.

It is an arithmetic number, because the mean of its divisors is an integer number (424232846232).

Almost surely, 2^{2121164231145} is an apocalyptic number.

It is an amenable number.

2121164231145 is a deficient number, since it is larger than the sum of its proper divisors (1272698538711).

2121164231145 is a wasteful number, since it uses less digits than its factorization.

2121164231145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141410948751.

The product of its digits is 11520, while the sum is 33.

Adding to 2121164231145 its reverse (5411324611212), we get a palindrome (7532488842357).

The spelling of 2121164231145 in words is "two trillion, one hundred twenty-one billion, one hundred sixty-four million, two hundred thirty-one thousand, one hundred forty-five".