12122102100042 has 40 divisors (see below), whose sum is σ = 29631805137792. Its totient is φ = 3673364272200.

The previous prime is 12122102100041. The next prime is 12122102100103. The reversal of 12122102100042 is 24000120122121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12122102099988 and 12122102100024.

It is not an unprimeable number, because it can be changed into a prime (12122102100041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3401261434 + ... + 3401264997.

Almost surely, 2^{12122102100042} is an apocalyptic number.

12122102100042 is an abundant number, since it is smaller than the sum of its proper divisors (17509703037750).

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

12122102100042 is a wasteful number, since it uses less digits than its factorization.

12122102100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6802526456 (or 6802526447 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12122102100042 its reverse (24000120122121), we get a palindrome (36122222222163).

The spelling of 12122102100042 in words is "twelve trillion, one hundred twenty-two billion, one hundred two million, one hundred thousand, forty-two".