1221332331031 has 8 divisors (see below), whose sum is σ = 1274480346240. Its totient is φ = 1168188199992.

The previous prime is 1221332331029. The next prime is 1221332331059. The reversal of 1221332331031 is 1301332331221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221332331031 - 2¹ = 1221332331029 is a prime.

It is a super-2 number, since 2×1221332331031² (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 = 1221332330987 and 1221332331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221332331431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319165 + ... + 1595158.

It is an arithmetic number, because the mean of its divisors is an integer number (159310043280).

Almost surely, 2^{1221332331031} is an apocalyptic number.

1221332331031 is a deficient number, since it is larger than the sum of its proper divisors (53148015209).

1221332331031 is a wasteful number, since it uses less digits than its factorization.

1221332331031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942085.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1221332331031 its reverse (1301332331221), we get a palindrome (2522664662252).

The spelling of 1221332331031 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, three hundred thirty-one thousand, thirty-one".