10002320121 has 16 divisors (see below), whose sum is σ = 13560356288. Its totient is φ = 6556334400.

The previous prime is 10002320099. The next prime is 10002320129. The reversal of 10002320121 is 12102320001.

It is not a de Polignac number, because 10002320121 - 2¹⁵ = 10002287353 is a prime.

It is a super-2 number, since 2×10002320121² (a number of 21 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 = 10002320097 and 10002320106.

It is not an unprimeable number, because it can be changed into a prime (10002320129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534495 + ... + 552891.

It is an arithmetic number, because the mean of its divisors is an integer number (847522268).

Almost surely, 2^10002320121 is an apocalyptic number.

It is an amenable number.

10002320121 is a deficient number, since it is larger than the sum of its proper divisors (3558036167).

10002320121 is a wasteful number, since it uses less digits than its factorization.

10002320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21432.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 10002320121 its reverse (12102320001), we get a palindrome (22104640122).

The spelling of 10002320121 in words is "ten billion, two million, three hundred twenty thousand, one hundred twenty-one".