1031221223232 has 56 divisors (see below), whose sum is σ = 2794986812352. Its totient is φ = 335356492800.

The previous prime is 1031221223231. The next prime is 1031221223233. The reversal of 1031221223232 is 2323221221301.

It is an interprime number because it is at equal distance from previous prime (1031221223231) and next prime (1031221223233).

It is a super-2 number, since 2×1031221223232² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031221223231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65491444 + ... + 65507187.

It is an arithmetic number, because the mean of its divisors is an integer number (49910478792).

Almost surely, 2^{1031221223232} is an apocalyptic number.

1031221223232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1031221223232 is an abundant number, since it is smaller than the sum of its proper divisors (1763765589120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1031221223232 is a wasteful number, since it uses less digits than its factorization.

1031221223232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130998687 (or 130998677 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1031221223232 its reverse (2323221221301), we get a palindrome (3354442444533).

The spelling of 1031221223232 in words is "one trillion, thirty-one billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-two".