1153122121 has 8 divisors (see below), whose sum is σ = 1222863264. Its totient is φ = 1083593280.

The previous prime is 1153122119. The next prime is 1153122127. The reversal of 1153122121 is 1212213511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1153122121 - 2¹ = 1153122119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153122127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41815 + ... + 63676.

It is an arithmetic number, because the mean of its divisors is an integer number (152857908).

Almost surely, 2^1153122121 is an apocalyptic number.

It is an amenable number.

1153122121 is a deficient number, since it is larger than the sum of its proper divisors (69741143).

1153122121 is a wasteful number, since it uses less digits than its factorization.

1153122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106151.

The product of its digits is 120, while the sum is 19.

The square root of 1153122121 is about 33957.6518770070. The cubic root of 1153122121 is about 1048.6368163215.

Adding to 1153122121 its reverse (1212213511), we get a palindrome (2365335632).

The spelling of 1153122121 in words is "one billion, one hundred fifty-three million, one hundred twenty-two thousand, one hundred twenty-one".