12221102357445 has 32 divisors (see below), whose sum is σ = 19610891524224. Its totient is φ = 6498881945600.

The previous prime is 12221102357383. The next prime is 12221102357501. The reversal of 12221102357445 is 54475320112221.

It is not a de Polignac number, because 12221102357445 - 2²⁰ = 12221101308869 is a prime.

It is a super-2 number, since 2×12221102357445² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63502165 + ... + 63694325.

It is an arithmetic number, because the mean of its divisors is an integer number (612840360132).

Almost surely, 2^{12221102357445} is an apocalyptic number.

12221102357445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12221102357445 is a deficient number, since it is larger than the sum of its proper divisors (7389789166779).

12221102357445 is a wasteful number, since it uses less digits than its factorization.

12221102357445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204533.

The product of its (nonzero) digits is 134400, while the sum is 39.

Adding to 12221102357445 its reverse (54475320112221), we get a palindrome (66696422469666).

The spelling of 12221102357445 in words is "twelve trillion, two hundred twenty-one billion, one hundred two million, three hundred fifty-seven thousand, four hundred forty-five".