123456221445 has 32 divisors (see below), whose sum is σ = 199079798400. Its totient is φ = 65327318784.

The previous prime is 123456221401. The next prime is 123456221461. The reversal of 123456221445 is 544122654321.

It is not a de Polignac number, because 123456221445 - 2⁹ = 123456220933 is a prime.

It is a super-2 number, since 2×123456221445² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3344751 + ... + 3381459.

It is an arithmetic number, because the mean of its divisors is an integer number (6221243700).

Almost surely, 2^123456221445 is an apocalyptic number.

123456221445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123456221445 is a deficient number, since it is larger than the sum of its proper divisors (75623576955).

123456221445 is a wasteful number, since it uses less digits than its factorization.

123456221445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38469.

The product of its digits is 230400, while the sum is 39.

Adding to 123456221445 its reverse (544122654321), we get a palindrome (667578875766).

The spelling of 123456221445 in words is "one hundred twenty-three billion, four hundred fifty-six million, two hundred twenty-one thousand, four hundred forty-five".