1321102123 has 16 divisors (see below), whose sum is σ = 1485493632. Its totient is φ = 1164456000.

The previous prime is 1321102121. The next prime is 1321102207. The reversal of 1321102123 is 3212011231.

It is a cyclic number.

It is not a de Polignac number, because 1321102123 - 2¹ = 1321102121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321102097 and 1321102106.

It is not an unprimeable number, because it can be changed into a prime (1321102121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64528 + ... + 82498.

It is an arithmetic number, because the mean of its divisors is an integer number (92843352).

Almost surely, 2^1321102123 is an apocalyptic number.

1321102123 is a deficient number, since it is larger than the sum of its proper divisors (164391509).

1321102123 is a wasteful number, since it uses less digits than its factorization.

1321102123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18186.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1321102123 is about 36346.9685530994. The cubic root of 1321102123 is about 1097.2665251251.

Adding to 1321102123 its reverse (3212011231), we get a palindrome (4533113354).

The spelling of 1321102123 in words is "one billion, three hundred twenty-one million, one hundred two thousand, one hundred twenty-three".