1130123121 has 16 divisors (see below), whose sum is σ = 1514434560. Its totient is φ = 749623680.

The previous prime is 1130123087. The next prime is 1130123167. The reversal of 1130123121 is 1213210311.

It is a happy number.

It is not a de Polignac number, because 1130123121 - 2¹⁴ = 1130106737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1130123121.

It is not an unprimeable number, because it can be changed into a prime (1130123171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882960 + ... + 884238.

It is an arithmetic number, because the mean of its divisors is an integer number (94652160).

Almost surely, 2^1130123121 is an apocalyptic number.

It is an amenable number.

1130123121 is a deficient number, since it is larger than the sum of its proper divisors (384311439).

1130123121 is a wasteful number, since it uses less digits than its factorization.

1130123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1130123121 is about 33617.3038924897. The cubic root of 1130123121 is about 1041.6182649667.

Adding to 1130123121 its reverse (1213210311), we get a palindrome (2343333432).

It can be divided in two parts, 1130 and 123121, that added together give a triangular number (124251 = T₄₉₈).

The spelling of 1130123121 in words is "one billion, one hundred thirty million, one hundred twenty-three thousand, one hundred twenty-one".