10003507121621 has 8 divisors (see below), whose sum is σ = 10790992665600. Its totient is φ = 9218590862832.

The previous prime is 10003507121609. The next prime is 10003507121669. The reversal of 10003507121621 is 12612170530001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10003507121621 - 2¹⁴ = 10003507105237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003507121921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642313205 + ... + 642328778.

It is an arithmetic number, because the mean of its divisors is an integer number (1348874083200).

Almost surely, 2^{10003507121621} is an apocalyptic number.

It is an amenable number.

10003507121621 is a deficient number, since it is larger than the sum of its proper divisors (787485543979).

10003507121621 is a wasteful number, since it uses less digits than its factorization.

10003507121621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284642595.

The product of its (nonzero) digits is 2520, while the sum is 29.

Adding to 10003507121621 its reverse (12612170530001), we get a palindrome (22615677651622).

The spelling of 10003507121621 in words is "ten trillion, three billion, five hundred seven million, one hundred twenty-one thousand, six hundred twenty-one".