213002232121 has 12 divisors (see below), whose sum is σ = 248084429940. Its totient is φ = 182347630080.

The previous prime is 213002232119. The next prime is 213002232151. The reversal of 213002232121 is 121232200312.

213002232121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 139083497721 + 73918734400 = 372939^2 + 271880^2 .

It is not a de Polignac number, because 213002232121 - 2¹ = 213002232119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213002232151) 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 11 ways as a sum of consecutive naturals, for example, 2647000 + ... + 2726281.

It is an arithmetic number, because the mean of its divisors is an integer number (20673702495).

Almost surely, 2^213002232121 is an apocalyptic number.

It is an amenable number.

213002232121 is a deficient number, since it is larger than the sum of its proper divisors (35082197819).

213002232121 is an equidigital number, since it uses as much as digits as its factorization.

213002232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374104 (or 5374097 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 213002232121 its reverse (121232200312), we get a palindrome (334234432433).

The spelling of 213002232121 in words is "two hundred thirteen billion, two million, two hundred thirty-two thousand, one hundred twenty-one".