7125121103 has 4 divisors (see below), whose sum is σ = 7132183680. Its totient is φ = 7118058528.

The previous prime is 7125121093. The next prime is 7125121111. The reversal of 7125121103 is 3011215217.

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 7125121103 - 2¹⁸ = 7124858959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7125121123) 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, 3529775 + ... + 3531792.

It is an arithmetic number, because the mean of its divisors is an integer number (1783045920).

Almost surely, 2^7125121103 is an apocalyptic number.

7125121103 is a deficient number, since it is larger than the sum of its proper divisors (7062577).

7125121103 is a wasteful number, since it uses less digits than its factorization.

7125121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062576.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 7125121103 is about 84410.4324298839. The cubic root of 7125121103 is about 1924.2614676827.

The spelling of 7125121103 in words is "seven billion, one hundred twenty-five million, one hundred twenty-one thousand, one hundred three".