1321010123123 has 4 divisors (see below), whose sum is σ = 1321116745968. Its totient is φ = 1320903500280.

The previous prime is 1321010123117. The next prime is 1321010123179. The reversal of 1321010123123 is 3213210101231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1321010123123 - 2¹² = 1321010119027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321010123095 and 1321010123104.

It is not an unprimeable number, because it can be changed into a prime (1321010123113) 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, 53292836 + ... + 53317617.

It is an arithmetic number, because the mean of its divisors is an integer number (330279186492).

Almost surely, 2^{1321010123123} is an apocalyptic number.

1321010123123 is a deficient number, since it is larger than the sum of its proper divisors (106622845).

1321010123123 is a wasteful number, since it uses less digits than its factorization.

1321010123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106622844.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321010123123 its reverse (3213210101231), we get a palindrome (4534220224354).

The spelling of 1321010123123 in words is "one trillion, three hundred twenty-one billion, ten million, one hundred twenty-three thousand, one hundred twenty-three".