20213231312101 has 2 divisors, whose sum is σ = 20213231312102. Its totient is φ = 20213231312100.

The previous prime is 20213231312059. The next prime is 20213231312137. The reversal of 20213231312101 is 10121313231202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18357574361476 + 1855656950625 = 4284574^2 + 1362225^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213231312101 - 2¹¹ = 20213231310053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213231312501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106615656050 + 10106615656051.

It is an arithmetic number, because the mean of its divisors is an integer number (10106615656051).

Almost surely, 2^{20213231312101} is an apocalyptic number.

It is an amenable number.

20213231312101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213231312101 is an equidigital number, since it uses as much as digits as its factorization.

20213231312101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20213231312101 its reverse (10121313231202), we get a palindrome (30334544543303).

The spelling of 20213231312101 in words is "twenty trillion, two hundred thirteen billion, two hundred thirty-one million, three hundred twelve thousand, one hundred one".