103121091 has 24 divisors (see below), whose sum is σ = 150958080. Its totient is φ = 67830000.

The previous prime is 103121089. The next prime is 103121131. The reversal of 103121091 is 190121301.

It is not a de Polignac number, because 103121091 - 2¹ = 103121089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (103121591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410716 + ... + 410966.

It is an arithmetic number, because the mean of its divisors is an integer number (6289920).

Almost surely, 2^103121091 is an apocalyptic number.

103121091 is a deficient number, since it is larger than the sum of its proper divisors (47836989).

103121091 is a wasteful number, since it uses less digits than its factorization.

103121091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 103121091 is about 10154.8555381157. The cubic root of 103121091 is about 468.9384385838.

Adding to 103121091 its reverse (190121301), we get a palindrome (293242392).

It can be divided in two parts, 1031210 and 91, that added together give a palindrome (1031301).

The spelling of 103121091 in words is "one hundred three million, one hundred twenty-one thousand, ninety-one".