10203031120021 has 2 divisors, whose sum is σ = 10203031120022. Its totient is φ = 10203031120020.

The previous prime is 10203031119949. The next prime is 10203031120039. The reversal of 10203031120021 is 12002113030201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8969845300900 + 1233185819121 = 2994970^2 + 1110489^2 .

It is a cyclic number.

It is not a de Polignac number, because 10203031120021 - 2¹¹ = 10203031117973 is a prime.

It is a super-2 number, since 2×10203031120021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10203031119977 and 10203031120004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10203034120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101515560010 + 5101515560011.

It is an arithmetic number, because the mean of its divisors is an integer number (5101515560011).

Almost surely, 2^{10203031120021} is an apocalyptic number.

It is an amenable number.

10203031120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10203031120021 is an equidigital number, since it uses as much as digits as its factorization.

10203031120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10203031120021 its reverse (12002113030201), we get a palindrome (22205144150222).

The spelling of 10203031120021 in words is "ten trillion, two hundred three billion, thirty-one million, one hundred twenty thousand, twenty-one".