103111211123121 has 4 divisors (see below), whose sum is σ = 137481614830832. Its totient is φ = 68740807415412.

The previous prime is 103111211123099. The next prime is 103111211123131. The reversal of 103111211123121 is 121321112111301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 103111211123121 - 2¹⁵ = 103111211090353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103111211123131) 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, 17185201853851 + ... + 17185201853856.

It is an arithmetic number, because the mean of its divisors is an integer number (34370403707708).

Almost surely, 2^{103111211123121} is an apocalyptic number.

It is an amenable number.

103111211123121 is a deficient number, since it is larger than the sum of its proper divisors (34370403707711).

103111211123121 is an equidigital number, since it uses as much as digits as its factorization.

103111211123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34370403707710.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 103111211123121 its reverse (121321112111301), we get a palindrome (224432323234422).

The spelling of 103111211123121 in words is "one hundred three trillion, one hundred eleven billion, two hundred eleven million, one hundred twenty-three thousand, one hundred twenty-one".