103121111 has 4 divisors (see below), whose sum is σ = 103246632. Its totient is φ = 102995592.

The previous prime is 103121089. The next prime is 103121131. The reversal of 103121111 is 111121301.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 103121111 - 2⁶ = 103121047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103121092 and 103121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61520 + ... + 63173.

It is an arithmetic number, because the mean of its divisors is an integer number (25811658).

Almost surely, 2^103121111 is an apocalyptic number.

103121111 is a deficient number, since it is larger than the sum of its proper divisors (125521).

103121111 is an equidigital number, since it uses as much as digits as its factorization.

103121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125520.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 103121111 is about 10154.8565228663. The cubic root of 103121111 is about 468.9384689001.

Adding to 103121111 its reverse (111121301), we get a palindrome (214242412).

The spelling of 103121111 in words is "one hundred three million, one hundred twenty-one thousand, one hundred eleven".