213121130033 has 6 divisors (see below), whose sum is σ = 247916416626. Its totient is φ = 182675254272.

The previous prime is 213121130029. The next prime is 213121130051. The reversal of 213121130033 is 330031121312.

It can be written as a sum of positive squares in only one way, i.e., 177719578624 + 35401551409 = 421568^2 + 188153^2 .

It is not a de Polignac number, because 213121130033 - 2² = 213121130029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213121129987 and 213121130014.

It is not an unprimeable number, because it can be changed into a prime (213121130023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2174705360 + ... + 2174705457.

It is an arithmetic number, because the mean of its divisors is an integer number (41319402771).

Almost surely, 2^213121130033 is an apocalyptic number.

It is an amenable number.

213121130033 is a deficient number, since it is larger than the sum of its proper divisors (34795286593).

213121130033 is an equidigital number, since it uses as much as digits as its factorization.

213121130033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4349410831 (or 4349410824 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 213121130033 its reverse (330031121312), we get a palindrome (543152251345).

The spelling of 213121130033 in words is "two hundred thirteen billion, one hundred twenty-one million, one hundred thirty thousand, thirty-three".