2135421321 has 8 divisors (see below), whose sum is σ = 3106067424. Its totient is φ = 1294194720.

The previous prime is 2135421319. The next prime is 2135421371. The reversal of 2135421321 is 1231245312.

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

It is not a de Polignac number, because 2135421321 - 2¹ = 2135421319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2135421291 and 2135421300.

It is not an unprimeable number, because it can be changed into a prime (2135421371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32354836 + ... + 32354901.

It is an arithmetic number, because the mean of its divisors is an integer number (388258428).

Almost surely, 2^2135421321 is an apocalyptic number.

It is an amenable number.

2135421321 is a deficient number, since it is larger than the sum of its proper divisors (970646103).

2135421321 is a wasteful number, since it uses less digits than its factorization.

2135421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64709751.

The product of its digits is 1440, while the sum is 24.

The square root of 2135421321 is about 46210.6191367309. The cubic root of 2135421321 is about 1287.7390279307.

Adding to 2135421321 its reverse (1231245312), we get a palindrome (3366666633).

The spelling of 2135421321 in words is "two billion, one hundred thirty-five million, four hundred twenty-one thousand, three hundred twenty-one".