1002203123101 has 2 divisors, whose sum is σ = 1002203123102. Its totient is φ = 1002203123100.

The previous prime is 1002203123087. The next prime is 1002203123149. The reversal of 1002203123101 is 1013213022001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 733376427876 + 268826695225 = 856374^2 + 518485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002203123101 - 2⁵ = 1002203123069 is a prime.

It is a super-2 number, since 2×1002203123101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002203123171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501101561550 + 501101561551.

It is an arithmetic number, because the mean of its divisors is an integer number (501101561551).

Almost surely, 2^{1002203123101} is an apocalyptic number.

It is an amenable number.

1002203123101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002203123101 is an equidigital number, since it uses as much as digits as its factorization.

1002203123101 is an evil number, because the sum of its binary digits is even.

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

Adding to 1002203123101 its reverse (1013213022001), we get a palindrome (2015416145102).

The spelling of 1002203123101 in words is "one trillion, two billion, two hundred three million, one hundred twenty-three thousand, one hundred one".