201023220320381 has 2 divisors, whose sum is σ = 201023220320382. Its totient is φ = 201023220320380.

The previous prime is 201023220320341. The next prime is 201023220320423. The reversal of 201023220320381 is 183023022320102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171289200062500 + 29734020257881 = 13087750^2 + 5452891^2 .

It is a cyclic number.

It is not a de Polignac number, because 201023220320381 - 2¹⁸ = 201023220058237 is a prime.

It is a super-2 number, since 2×201023220320381² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201023220320341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100511610160190 + 100511610160191.

It is an arithmetic number, because the mean of its divisors is an integer number (100511610160191).

Almost surely, 2^{201023220320381} is an apocalyptic number.

It is an amenable number.

201023220320381 is a deficient number, since it is larger than the sum of its proper divisors (1).

201023220320381 is an equidigital number, since it uses as much as digits as its factorization.

201023220320381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 201023220320381 its reverse (183023022320102), we get a palindrome (384046242640483).

The spelling of 201023220320381 in words is "two hundred one trillion, twenty-three billion, two hundred twenty million, three hundred twenty thousand, three hundred eighty-one".