1005232111221 has 64 divisors (see below), whose sum is σ = 1503704401920. Its totient is φ = 593071476480.

The previous prime is 1005232111181. The next prime is 1005232111363. The reversal of 1005232111221 is 1221112325001.

It is not a de Polignac number, because 1005232111221 - 2²⁷ = 1005097893493 is a prime.

It is a super-2 number, since 2×1005232111221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005232112221) 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 63 ways as a sum of consecutive naturals, for example, 307314816 + ... + 307318086.

It is an arithmetic number, because the mean of its divisors is an integer number (23495381280).

Almost surely, 2^{1005232111221} is an apocalyptic number.

It is an amenable number.

1005232111221 is a deficient number, since it is larger than the sum of its proper divisors (498472290699).

1005232111221 is a wasteful number, since it uses less digits than its factorization.

1005232111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 1005232111221 its reverse (1221112325001), we get a palindrome (2226344436222).

The spelling of 1005232111221 in words is "one trillion, five billion, two hundred thirty-two million, one hundred eleven thousand, two hundred twenty-one".