10203644315421 has 64 divisors (see below), whose sum is σ = 15778335513600. Its totient is φ = 6511247975232.

The previous prime is 10203644315411. The next prime is 10203644315443. The reversal of 10203644315421 is 12451344630201.

10203644315421 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 3 + 644 + 3 + 1 + 5 + 4 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-10203644315421 is a prime.

It is a super-2 number, since 2×10203644315421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10203644315411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52760326 + ... + 52953368.

It is an arithmetic number, because the mean of its divisors is an integer number (246536492400).

Almost surely, 2^{10203644315421} is an apocalyptic number.

It is an amenable number.

10203644315421 is a deficient number, since it is larger than the sum of its proper divisors (5574691198179).

10203644315421 is a wasteful number, since it uses less digits than its factorization.

10203644315421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194007 (or 194001 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 10203644315421 its reverse (12451344630201), we get a palindrome (22654988945622).

The spelling of 10203644315421 in words is "ten trillion, two hundred three billion, six hundred forty-four million, three hundred fifteen thousand, four hundred twenty-one".