1321221024123 has 64 divisors (see below), whose sum is σ = 2365538660352. Its totient is φ = 633478654080.

The previous prime is 1321221024121. The next prime is 1321221024127. The reversal of 1321221024123 is 3214201221231.

It is not a de Polignac number, because 1321221024123 - 2¹ = 1321221024121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321221024093 and 1321221024102.

It is not an unprimeable number, because it can be changed into a prime (1321221024121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32661436 + ... + 32701862.

It is an arithmetic number, because the mean of its divisors is an integer number (36961541568).

Almost surely, 2^{1321221024123} is an apocalyptic number.

1321221024123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321221024123 is a deficient number, since it is larger than the sum of its proper divisors (1044317636229).

1321221024123 is a wasteful number, since it uses less digits than its factorization.

1321221024123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51344.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1321221024123 its reverse (3214201221231), we get a palindrome (4535422245354).

The spelling of 1321221024123 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-one million, twenty-four thousand, one hundred twenty-three".