7125121123 has 2 divisors, whose sum is σ = 7125121124. Its totient is φ = 7125121122.

The previous prime is 7125121111. The next prime is 7125121219. The reversal of 7125121123 is 3211215217.

7125121123 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7125121123 - 2¹³ = 7125112931 is a prime.

It is a super-2 number, since 2×7125121123² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7125161123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3562560561 + 3562560562.

It is an arithmetic number, because the mean of its divisors is an integer number (3562560562).

Almost surely, 2^7125121123 is an apocalyptic number.

7125121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

7125121123 is an equidigital number, since it uses as much as digits as its factorization.

7125121123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 7125121123 is about 84410.4325483527. The cubic root of 7125121123 is about 1924.2614694831.

The spelling of 7125121123 in words is "seven billion, one hundred twenty-five million, one hundred twenty-one thousand, one hundred twenty-three".