20231002101221 has 2 divisors, whose sum is σ = 20231002101222. Its totient is φ = 20231002101220.

The previous prime is 20231002101137. The next prime is 20231002101269. The reversal of 20231002101221 is 12210120013202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19466008720900 + 764993380321 = 4412030^2 + 874639^2 .

It is a cyclic number.

It is not a de Polignac number, because 20231002101221 - 2¹⁴ = 20231002084837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20231002101221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20231002101521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115501050610 + 10115501050611.

It is an arithmetic number, because the mean of its divisors is an integer number (10115501050611).

Almost surely, 2^{20231002101221} is an apocalyptic number.

It is an amenable number.

20231002101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231002101221 is an equidigital number, since it uses as much as digits as its factorization.

20231002101221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20231002101221 its reverse (12210120013202), we get a palindrome (32441122114423).

The spelling of 20231002101221 in words is "twenty trillion, two hundred thirty-one billion, two million, one hundred one thousand, two hundred twenty-one".