1213321220023 has 8 divisors (see below), whose sum is σ = 1323773957376. Its totient is φ = 1102893617400.

The previous prime is 1213321220003. The next prime is 1213321220051. The reversal of 1213321220023 is 3200221233121.

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 1213321220023 - 2²⁹ = 1212784349111 is a prime.

It is a super-2 number, since 2×1213321220023² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213321219976 and 1213321220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213321220003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6182673 + ... + 6375898.

It is an arithmetic number, because the mean of its divisors is an integer number (165471744672).

Almost surely, 2^{1213321220023} is an apocalyptic number.

1213321220023 is a deficient number, since it is larger than the sum of its proper divisors (110452737353).

1213321220023 is a wasteful number, since it uses less digits than its factorization.

1213321220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12567365.

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

Adding to 1213321220023 its reverse (3200221233121), we get a palindrome (4413542453144).

The spelling of 1213321220023 in words is "one trillion, two hundred thirteen billion, three hundred twenty-one million, two hundred twenty thousand, twenty-three".