213021223001 has 2 divisors, whose sum is σ = 213021223002. Its totient is φ = 213021223000.

The previous prime is 213021222989. The next prime is 213021223003. The reversal of 213021223001 is 100322120312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208552968976 + 4468254025 = 456676^2 + 66845^2 .

It is a cyclic number.

It is not a de Polignac number, because 213021223001 - 2⁶ = 213021222937 is a prime.

Together with 213021223003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213021223003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510611500 + 106510611501.

It is an arithmetic number, because the mean of its divisors is an integer number (106510611501).

Almost surely, 2^213021223001 is an apocalyptic number.

It is an amenable number.

213021223001 is a deficient number, since it is larger than the sum of its proper divisors (1).

213021223001 is an equidigital number, since it uses as much as digits as its factorization.

213021223001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 213021223001 its reverse (100322120312), we get a palindrome (313343343313).

The spelling of 213021223001 in words is "two hundred thirteen billion, twenty-one million, two hundred twenty-three thousand, one".