1221332123331 has 24 divisors (see below), whose sum is σ = 1797513322176. Its totient is φ = 798822685440.

The previous prime is 1221332123321. The next prime is 1221332123353. The reversal of 1221332123331 is 1333212331221.

1221332123331 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 3 + 321 + 2 + 3 + 331 = 666.

It is not a de Polignac number, because 1221332123331 - 2¹³ = 1221332115139 is a prime.

It is a super-2 number, since 2×1221332123331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221332123295 and 1221332123304.

It is not an unprimeable number, because it can be changed into a prime (1221332123321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14206566 + ... + 14292276.

It is an arithmetic number, because the mean of its divisors is an integer number (74896388424).

Almost surely, 2^{1221332123331} is an apocalyptic number.

1221332123331 is a deficient number, since it is larger than the sum of its proper divisors (576181198845).

1221332123331 is a wasteful number, since it uses less digits than its factorization.

1221332123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115643 (or 115640 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1221332123331 its reverse (1333212331221), we get a palindrome (2554544454552).

The spelling of 1221332123331 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, one hundred twenty-three thousand, three hundred thirty-one".