1221132231031 has 8 divisors (see below), whose sum is σ = 1274236146144. Its totient is φ = 1168029250080.

The previous prime is 1221132231017. The next prime is 1221132231049. The reversal of 1221132231031 is 1301322311221.

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 1221132231031 - 2¹¹ = 1221132228983 is a prime.

It is a super-2 number, since 2×1221132231031² (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 = 1221132230993 and 1221132231011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221132231931) 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, 4361685 + ... + 4633201.

It is an arithmetic number, because the mean of its divisors is an integer number (159279518268).

Almost surely, 2^{1221132231031} is an apocalyptic number.

1221132231031 is a deficient number, since it is larger than the sum of its proper divisors (53103915113).

1221132231031 is a wasteful number, since it uses less digits than its factorization.

1221132231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467081.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1221132231031 its reverse (1301322311221), we get a palindrome (2522454542252).

The spelling of 1221132231031 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-two million, two hundred thirty-one thousand, thirty-one".