12101220118 has 32 divisors (see below), whose sum is σ = 20585456640. Its totient is φ = 5289040800.

The previous prime is 12101220091. The next prime is 12101220119. The reversal of 12101220118 is 81102210121.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 12101220095 and 12101220104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101220119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998171 + ... + 2004217.

It is an arithmetic number, because the mean of its divisors is an integer number (643295520).

Almost surely, 2^12101220118 is an apocalyptic number.

12101220118 is a deficient number, since it is larger than the sum of its proper divisors (8484236522).

12101220118 is a wasteful number, since it uses less digits than its factorization.

12101220118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10132.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12101220118 its reverse (81102210121), we get a palindrome (93203430239).

The spelling of 12101220118 in words is "twelve billion, one hundred one million, two hundred twenty thousand, one hundred eighteen".