12121403356 has 24 divisors (see below), whose sum is σ = 21577222800. Its totient is φ = 5956887552.

The previous prime is 12121403317. The next prime is 12121403377. The reversal of 12121403356 is 65330412121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69966 + ... + 170698.

It is an arithmetic number, because the mean of its divisors is an integer number (899050950).

Almost surely, 2^12121403356 is an apocalyptic number.

It is an amenable number.

12121403356 is a deficient number, since it is larger than the sum of its proper divisors (9455819444).

12121403356 is a wasteful number, since it uses less digits than its factorization.

12121403356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101253 (or 101251 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 12121403356 its reverse (65330412121), we get a palindrome (77451815477).

The spelling of 12121403356 in words is "twelve billion, one hundred twenty-one million, four hundred three thousand, three hundred fifty-six".