202031002021 has 2 divisors, whose sum is σ = 202031002022. Its totient is φ = 202031002020.

The previous prime is 202031002009. The next prime is 202031002031. The reversal of 202031002021 is 120200130202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195111257796 + 6919744225 = 441714^2 + 83185^2 .

It is a cyclic number.

It is not a de Polignac number, because 202031002021 - 2¹⁷ = 202030870949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202031001992 and 202031002010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202031002031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101015501010 + 101015501011.

It is an arithmetic number, because the mean of its divisors is an integer number (101015501011).

Almost surely, 2^202031002021 is an apocalyptic number.

It is an amenable number.

202031002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202031002021 is an equidigital number, since it uses as much as digits as its factorization.

202031002021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 202031002021 its reverse (120200130202), we get a palindrome (322231132223).

The spelling of 202031002021 in words is "two hundred two billion, thirty-one million, two thousand, twenty-one".