103010120021 has 4 divisors (see below), whose sum is σ = 103015516332. Its totient is φ = 103004723712.

The previous prime is 103010119943. The next prime is 103010120027. The reversal of 103010120021 is 120021010301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120021010301 = 19 ⋅6316895279.

It can be written as a sum of positive squares in 2 ways, for example, as 4005497521 + 99004622500 = 63289^2 + 314650^2 .

It is a cyclic number.

It is not a de Polignac number, because 103010120021 - 2¹⁸ = 103009857877 is a prime.

It is a super-2 number, since 2×103010120021² (a number of 23 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 = 103010119984 and 103010120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103010120027) 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, 2669420 + ... + 2707733.

It is an arithmetic number, because the mean of its divisors is an integer number (25753879083).

Almost surely, 2^103010120021 is an apocalyptic number.

It is an amenable number.

103010120021 is a deficient number, since it is larger than the sum of its proper divisors (5396311).

103010120021 is an equidigital number, since it uses as much as digits as its factorization.

103010120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396310.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 103010120021 its reverse (120021010301), we get a palindrome (223031130322).

The spelling of 103010120021 in words is "one hundred three billion, ten million, one hundred twenty thousand, twenty-one".