10103428030921 has 3 divisors (see below), whose sum is σ = 10103431209511. Its totient is φ = 10103424852332.

The previous prime is 10103428030907. The next prime is 10103428030973. The reversal of 10103428030921 is 12903082430101.

It is a happy number.

The square root of 10103428030921 is 3178589.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 883338699321 + 9220089331600 = 939861^2 + 3036460^2 .

It is not a de Polignac number, because 10103428030921 - 2⁵ = 10103428030889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10103428030121) 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 in 2 ways as a sum of consecutive naturals, for example, 1589295 + ... + 4767883.

Almost surely, 2^{10103428030921} is an apocalyptic number.

10103428030921 is the 3178589-th square number.

10103428030921 is the 1589295-th centered octagonal number.

It is an amenable number.

10103428030921 is a deficient number, since it is larger than the sum of its proper divisors (3178590).

10103428030921 is an frugal number, since it uses more digits than its factorization.

10103428030921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357178 (or 3178589 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 10103428030921 in words is "ten trillion, one hundred three billion, four hundred twenty-eight million, thirty thousand, nine hundred twenty-one".