12101221554236 has 12 divisors (see below), whose sum is σ = 21283555498800. Its totient is φ = 6020205697440.

The previous prime is 12101221554209. The next prime is 12101221554239. The reversal of 12101221554236 is 63245512210121.

It is a junction number, because it is equal to n+sod(n) for n = 12101221554196 and 12101221554205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101221554239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7601269025 + ... + 7601270616.

It is an arithmetic number, because the mean of its divisors is an integer number (1773629624900).

Almost surely, 2^{12101221554236} is an apocalyptic number.

It is an amenable number.

12101221554236 is a deficient number, since it is larger than the sum of its proper divisors (9182333944564).

12101221554236 is a wasteful number, since it uses less digits than its factorization.

12101221554236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15202539844 (or 15202539842 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 12101221554236 its reverse (63245512210121), we get a palindrome (75346733764357).

The spelling of 12101221554236 in words is "twelve trillion, one hundred one billion, two hundred twenty-one million, five hundred fifty-four thousand, two hundred thirty-six".