103021512421 has 4 divisors (see below), whose sum is σ = 103076517772. Its totient is φ = 102966507072.

The previous prime is 103021512401. The next prime is 103021512427. The reversal of 103021512421 is 124215120301.

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 33478020900 + 69543491521 = 182970^2 + 263711^2 .

It is a cyclic number.

It is not a de Polignac number, because 103021512421 - 2¹¹ = 103021510373 is a prime.

It is a super-2 number, since 2×103021512421² (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 = 103021512392 and 103021512401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103021512427) 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, 27499866 + ... + 27503611.

It is an arithmetic number, because the mean of its divisors is an integer number (25769129443).

Almost surely, 2^103021512421 is an apocalyptic number.

It is an amenable number.

103021512421 is a deficient number, since it is larger than the sum of its proper divisors (55005351).

103021512421 is an equidigital number, since it uses as much as digits as its factorization.

103021512421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55005350.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 103021512421 its reverse (124215120301), we get a palindrome (227236632722).

The spelling of 103021512421 in words is "one hundred three billion, twenty-one million, five hundred twelve thousand, four hundred twenty-one".