1216200112156 has 24 divisors (see below), whose sum is σ = 2253584924640. Its totient is φ = 572319900672.

The previous prime is 1216200112133. The next prime is 1216200112159. The reversal of 1216200112156 is 6512110026121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216200112159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5519556 + ... + 5735668.

It is an arithmetic number, because the mean of its divisors is an integer number (93899371860).

Almost surely, 2^{1216200112156} is an apocalyptic number.

It is an amenable number.

1216200112156 is a deficient number, since it is larger than the sum of its proper divisors (1037384812484).

1216200112156 is a wasteful number, since it uses less digits than its factorization.

1216200112156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298893 (or 298891 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

Adding to 1216200112156 its reverse (6512110026121), we get a palindrome (7728310138277).

The spelling of 1216200112156 in words is "one trillion, two hundred sixteen billion, two hundred million, one hundred twelve thousand, one hundred fifty-six".