12221100042 has 16 divisors (see below), whose sum is σ = 24479638560. Its totient is φ = 4067460272.

The previous prime is 12221100041. The next prime is 12221100049. The reversal of 12221100042 is 24000112221.

It is a junction number, because it is equal to n+sod(n) for n = 12221099994 and 12221100030.

It is not an unprimeable number, because it can be changed into a prime (12221100041) 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, 1555692 + ... + 1563527.

It is an arithmetic number, because the mean of its divisors is an integer number (1529977410).

Almost surely, 2^12221100042 is an apocalyptic number.

12221100042 is an abundant number, since it is smaller than the sum of its proper divisors (12258538518).

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

12221100042 is a wasteful number, since it uses less digits than its factorization.

12221100042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119877.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12221100042 its reverse (24000112221), we get a palindrome (36221212263).

The spelling of 12221100042 in words is "twelve billion, two hundred twenty-one million, one hundred thousand, forty-two".