1120123121 has 4 divisors (see below), whose sum is σ = 1206286452. Its totient is φ = 1033959792.

The previous prime is 1120123111. The next prime is 1120123127. The reversal of 1120123121 is 1213210211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51552400 + 1068570721 = 7180^2 + 32689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1120123121 - 2²² = 1115928817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1120123096 and 1120123105.

It is not an unprimeable number, because it can be changed into a prime (1120123127) 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, 43081646 + ... + 43081671.

It is an arithmetic number, because the mean of its divisors is an integer number (301571613).

Almost surely, 2^1120123121 is an apocalyptic number.

It is an amenable number.

1120123121 is a deficient number, since it is larger than the sum of its proper divisors (86163331).

1120123121 is an equidigital number, since it uses as much as digits as its factorization.

1120123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86163330.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1120123121 is about 33468.2404825829. The cubic root of 1120123121 is about 1038.5368728489.

Adding to 1120123121 its reverse (1213210211), we get a palindrome (2333333332).

The spelling of 1120123121 in words is "one billion, one hundred twenty million, one hundred twenty-three thousand, one hundred twenty-one".