12228110137 has 4 divisors (see below), whose sum is σ = 12228335860. Its totient is φ = 12227884416.

The previous prime is 12228110123. The next prime is 12228110143. The reversal of 12228110137 is 73101182221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73101182221 = 113 ⋅646913117.

It can be written as a sum of positive squares in 2 ways, for example, as 12176901801 + 51208336 = 110349^2 + 7156^2 .

It is a 3-Lehmer number, since φ(12228110137) divides (12228110137-1)³.

It is a cyclic number.

It is not a de Polignac number, because 12228110137 - 2⁷ = 12228110009 is a prime.

It is a deceptive number, since it divides R_12228110136.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12228170137) 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, 22573 + ... + 158005.

It is an arithmetic number, because the mean of its divisors is an integer number (3057083965).

Almost surely, 2^12228110137 is an apocalyptic number.

12228110137 is the 90289-th pentagonal number.

It is an amenable number.

12228110137 is a deficient number, since it is larger than the sum of its proper divisors (225723).

12228110137 is an equidigital number, since it uses as much as digits as its factorization.

12228110137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225722.

The product of its (nonzero) digits is 1344, while the sum is 28.

Adding to 12228110137 its reverse (73101182221), we get a palindrome (85329292358).

The spelling of 12228110137 in words is "twelve billion, two hundred twenty-eight million, one hundred ten thousand, one hundred thirty-seven".