12221221355434 has 32 divisors (see below), whose sum is σ = 22987957749120. Its totient is φ = 4743546829632.

The previous prime is 12221221355383. The next prime is 12221221355471. The reversal of 12221221355434 is 43455312212221.

It is a super-2 number, since 2×12221221355434² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12221221355393 and 12221221355402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633476844 + ... + 633496135.

It is an arithmetic number, because the mean of its divisors is an integer number (718373679660).

Almost surely, 2^{12221221355434} is an apocalyptic number.

12221221355434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12221221355434 is a deficient number, since it is larger than the sum of its proper divisors (10766736393686).

12221221355434 is a wasteful number, since it uses less digits than its factorization.

12221221355434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266973054.

The product of its digits is 115200, while the sum is 37.

Adding to 12221221355434 its reverse (43455312212221), we get a palindrome (55676533567655).

The spelling of 12221221355434 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, three hundred fifty-five thousand, four hundred thirty-four".