213020020501 has 2 divisors, whose sum is σ = 213020020502. Its totient is φ = 213020020500.

The previous prime is 213020020489. The next prime is 213020020511. The reversal of 213020020501 is 105020020312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198154071025 + 14865949476 = 445145^2 + 121926^2 .

It is a cyclic number.

It is not a de Polignac number, because 213020020501 - 2¹⁹ = 213019496213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213020020511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510010250 + 106510010251.

It is an arithmetic number, because the mean of its divisors is an integer number (106510010251).

Almost surely, 2^213020020501 is an apocalyptic number.

It is an amenable number.

213020020501 is a deficient number, since it is larger than the sum of its proper divisors (1).

213020020501 is an equidigital number, since it uses as much as digits as its factorization.

213020020501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 213020020501 its reverse (105020020312), we get a palindrome (318040040813).

The spelling of 213020020501 in words is "two hundred thirteen billion, twenty million, twenty thousand, five hundred one".