1221302210323 has 16 divisors (see below), whose sum is σ = 1372477571136. Its totient is φ = 1078305592320.

The previous prime is 1221302210287. The next prime is 1221302210329. The reversal of 1221302210323 is 3230122031221.

It is not a de Polignac number, because 1221302210323 - 2⁹ = 1221302209811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221302210294 and 1221302210303.

It is not an unprimeable number, because it can be changed into a prime (1221302210329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14813511 + ... + 14895727.

It is an arithmetic number, because the mean of its divisors is an integer number (85779848196).

Almost surely, 2^{1221302210323} is an apocalyptic number.

1221302210323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1221302210323 is a deficient number, since it is larger than the sum of its proper divisors (151175360813).

1221302210323 is a wasteful number, since it uses less digits than its factorization.

1221302210323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131934.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1221302210323 its reverse (3230122031221), we get a palindrome (4451424241544).

The spelling of 1221302210323 in words is "one trillion, two hundred twenty-one billion, three hundred two million, two hundred ten thousand, three hundred twenty-three".