213220231002001 has 4 divisors (see below), whose sum is σ = 213695109022500. Its totient is φ = 212745352981504.

The previous prime is 213220231001957. The next prime is 213220231002013. The reversal of 213220231002001 is 100200132022312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132586565861376 + 80633665140625 = 11514624^2 + 8979625^2 .

It is a cyclic number.

It is not a de Polignac number, because 213220231002001 - 2³⁹ = 212670475188113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213220231002001.

It is not an unprimeable number, because it can be changed into a prime (213220231002041) 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, 237439009576 + ... + 237439010473.

It is an arithmetic number, because the mean of its divisors is an integer number (53423777255625).

Almost surely, 2^{213220231002001} is an apocalyptic number.

It is an amenable number.

213220231002001 is a deficient number, since it is larger than the sum of its proper divisors (474878020499).

213220231002001 is an equidigital number, since it uses as much as digits as its factorization.

213220231002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474878020498.

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

Adding to 213220231002001 its reverse (100200132022312), we get a palindrome (313420363024313).

The spelling of 213220231002001 in words is "two hundred thirteen trillion, two hundred twenty billion, two hundred thirty-one million, two thousand, one".