10421003421 has 6 divisors (see below), whose sum is σ = 15052560510. Its totient is φ = 6947335608.

The previous prime is 10421003413. The next prime is 10421003423. The reversal of 10421003421 is 12430012401.

It can be written as a sum of positive squares in only one way, i.e., 6701223321 + 3719780100 = 81861^2 + 60990^2 .

It is not a de Polignac number, because 10421003421 - 2³ = 10421003413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10421003394 and 10421003403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421003423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 578944626 + ... + 578944643.

It is an arithmetic number, because the mean of its divisors is an integer number (2508760085).

Almost surely, 2^10421003421 is an apocalyptic number.

It is an amenable number.

10421003421 is a deficient number, since it is larger than the sum of its proper divisors (4631557089).

10421003421 is a wasteful number, since it uses less digits than its factorization.

10421003421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157889275 (or 1157889272 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 10421003421 its reverse (12430012401), we get a palindrome (22851015822).

The spelling of 10421003421 in words is "ten billion, four hundred twenty-one million, three thousand, four hundred twenty-one".