213121213323001 has 4 divisors (see below), whose sum is σ = 213123394559104. Its totient is φ = 213119032086900.

The previous prime is 213121213322987. The next prime is 213121213323013. The reversal of 213121213323001 is 100323312121312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213121213323001 - 2³³ = 213112623388409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213121213323041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090471485 + ... + 1090666906.

It is an arithmetic number, because the mean of its divisors is an integer number (53280848639776).

Almost surely, 2^{213121213323001} is an apocalyptic number.

It is an amenable number.

213121213323001 is a deficient number, since it is larger than the sum of its proper divisors (2181236103).

213121213323001 is an equidigital number, since it uses as much as digits as its factorization.

213121213323001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181236102.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 213121213323001 its reverse (100323312121312), we get a palindrome (313444525444313).

The spelling of 213121213323001 in words is "two hundred thirteen trillion, one hundred twenty-one billion, two hundred thirteen million, three hundred twenty-three thousand, one".