100103011231021 has 4 divisors (see below), whose sum is σ = 100103033962492. Its totient is φ = 100102988499552.

The previous prime is 100103011230983. The next prime is 100103011231033. The reversal of 100103011231021 is 120132110301001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86540952902121 + 13562058328900 = 9302739^2 + 3682670^2 .

It is a cyclic number.

It is not a de Polignac number, because 100103011231021 - 2¹⁹ = 100103010706733 is a prime.

It is a super-2 number, since 2×100103011231021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100103011230986 and 100103011231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100103011231721) 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 in 3 ways as a sum of consecutive naturals, for example, 2405586 + ... + 14352451.

It is an arithmetic number, because the mean of its divisors is an integer number (25025758490623).

Almost surely, 2^{100103011231021} is an apocalyptic number.

It is an amenable number.

100103011231021 is a deficient number, since it is larger than the sum of its proper divisors (22731471).

100103011231021 is an equidigital number, since it uses as much as digits as its factorization.

100103011231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22731470.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 100103011231021 its reverse (120132110301001), we get a palindrome (220235121532022).

The spelling of 100103011231021 in words is "one hundred trillion, one hundred three billion, eleven million, two hundred thirty-one thousand, twenty-one".