10121320 has 32 divisors (see below), whose sum is σ = 24844320. Its totient is φ = 3680320.

The previous prime is 10121317. The next prime is 10121323. The reversal of 10121320 is 2312101.

It is an interprime number because it is at equal distance from previous prime (10121317) and next prime (10121323).

It is a super-2 number, since 2×10121320² = 204882237084800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10121297 and 10121306.

It is not an unprimeable number, because it can be changed into a prime (10121323) 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, 11062 + ... + 11941.

It is an arithmetic number, because the mean of its divisors is an integer number (776385).

Almost surely, 2^10121320 is an apocalyptic number.

10121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10121320 is an abundant number, since it is smaller than the sum of its proper divisors (14723000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10121320 is a wasteful number, since it uses less digits than its factorization.

10121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23025 (or 23021 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 10121320 is about 3181.4022065750. The cubic root of 10121320 is about 216.3112226001.

Adding to 10121320 its reverse (2312101), we get a palindrome (12433421).

It can be divided in two parts, 1012 and 1320, that added together give a palindrome (2332).

The spelling of 10121320 in words is "ten million, one hundred twenty-one thousand, three hundred twenty".