103112121321 has 12 divisors (see below), whose sum is σ = 162479706480. Its totient is φ = 62492194680.

The previous prime is 103112121271. The next prime is 103112121323. The reversal of 103112121321 is 123121211301.

103112121321 is a `hidden beast` number, since 10 + 311 + 2 + 1 + 21 + 321 = 666.

It is not a de Polignac number, because 103112121321 - 2²¹ = 103110024169 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 103112121294 and 103112121303.

It is not an unprimeable number, because it can be changed into a prime (103112121323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 520768191 + ... + 520768388.

It is an arithmetic number, because the mean of its divisors is an integer number (13539975540).

Almost surely, 2^103112121321 is an apocalyptic number.

103112121321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103112121321 is a deficient number, since it is larger than the sum of its proper divisors (59367585159).

103112121321 is a wasteful number, since it uses less digits than its factorization.

103112121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041536596 (or 1041536593 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 103112121321 its reverse (123121211301), we get a palindrome (226233332622).

The spelling of 103112121321 in words is "one hundred three billion, one hundred twelve million, one hundred twenty-one thousand, three hundred twenty-one".