20213021201 has 2 divisors, whose sum is σ = 20213021202. Its totient is φ = 20213021200.

The previous prime is 20213021189. The next prime is 20213021203. The reversal of 20213021201 is 10212031202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11119491601 + 9093529600 = 105449^2 + 95360^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213021201 - 2¹⁴ = 20213004817 is a prime.

Together with 20213021203, 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 (20213021203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106510600 + 10106510601.

It is an arithmetic number, because the mean of its divisors is an integer number (10106510601).

Almost surely, 2^20213021201 is an apocalyptic number.

It is an amenable number.

20213021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213021201 is an equidigital number, since it uses as much as digits as its factorization.

20213021201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20213021201 its reverse (10212031202), we get a palindrome (30425052403).

The spelling of 20213021201 in words is "twenty billion, two hundred thirteen million, twenty-one thousand, two hundred one".