12221400400004 has 24 divisors (see below), whose sum is σ = 21511588995288. Its totient is φ = 6075233795840.

The previous prime is 12221400399973. The next prime is 12221400400021. The reversal of 12221400400004 is 40000400412221.

It can be written as a sum of positive squares in 4 ways, for example, as 6059080710400 + 6162319689604 = 2461520^2 + 2482402^2 .

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 7 ways as a sum of consecutive naturals, for example, 32626334 + ... + 32998794.

It is an arithmetic number, because the mean of its divisors is an integer number (896316208137).

Almost surely, 2^{12221400400004} is an apocalyptic number.

It is an amenable number.

12221400400004 is a deficient number, since it is larger than the sum of its proper divisors (9290188595284).

12221400400004 is a wasteful number, since it uses less digits than its factorization.

12221400400004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420055 (or 420053 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12221400400004 its reverse (40000400412221), we get a palindrome (52221800812225).

The spelling of 12221400400004 in words is "twelve trillion, two hundred twenty-one billion, four hundred million, four hundred thousand, four".