1223132311221 has 32 divisors (see below), whose sum is σ = 1757079993600. Its totient is φ = 755235855360.

The previous prime is 1223132311213. The next prime is 1223132311241. The reversal of 1223132311221 is 1221132313221.

It is not a de Polignac number, because 1223132311221 - 2³ = 1223132311213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223132311191 and 1223132311200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223132311201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2447316 + ... + 2904413.

It is an arithmetic number, because the mean of its divisors is an integer number (54908749800).

Almost surely, 2^{1223132311221} is an apocalyptic number.

It is an amenable number.

1223132311221 is a deficient number, since it is larger than the sum of its proper divisors (533947682379).

1223132311221 is a wasteful number, since it uses less digits than its factorization.

1223132311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5351869.

The product of its digits is 864, while the sum is 24.

Adding to 1223132311221 its reverse (1221132313221), we get a palindrome (2444264624442).

The spelling of 1223132311221 in words is "one trillion, two hundred twenty-three billion, one hundred thirty-two million, three hundred eleven thousand, two hundred twenty-one".