20231002021 has 2 divisors, whose sum is σ = 20231002022. Its totient is φ = 20231002020.

The previous prime is 20231001983. The next prime is 20231002049. The reversal of 20231002021 is 12020013202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20209749921 + 21252100 = 142161^2 + 4610^2 .

It is a cyclic number.

It is not a de Polignac number, because 20231002021 - 2¹¹ = 20230999973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20231001992 and 20231002010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20231005021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115501010 + 10115501011.

It is an arithmetic number, because the mean of its divisors is an integer number (10115501011).

Almost surely, 2^20231002021 is an apocalyptic number.

It is an amenable number.

20231002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231002021 is an equidigital number, since it uses as much as digits as its factorization.

20231002021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20231002021 its reverse (12020013202), we get a palindrome (32251015223).

The spelling of 20231002021 in words is "twenty billion, two hundred thirty-one million, two thousand, twenty-one".