12100212012138 has 16 divisors (see below), whose sum is σ = 24249712062816. Its totient is φ = 4025189330960.

The previous prime is 12100212012079. The next prime is 12100212012139. The reversal of 12100212012138 is 83121021200121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12100212012139) 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, 2053665081 + ... + 2053670972.

It is an arithmetic number, because the mean of its divisors is an integer number (1515607003926).

Almost surely, 2^{12100212012138} is an apocalyptic number.

12100212012138 is an abundant number, since it is smaller than the sum of its proper divisors (12149500050678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12100212012138 is a wasteful number, since it uses less digits than its factorization.

12100212012138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107336549.

The product of its (nonzero) digits is 384, while the sum is 24.

Adding to 12100212012138 its reverse (83121021200121), we get a palindrome (95221233212259).

The spelling of 12100212012138 in words is "twelve trillion, one hundred billion, two hundred twelve million, twelve thousand, one hundred thirty-eight".