12011220198 has 24 divisors (see below), whose sum is σ = 26353735200. Its totient is φ = 3953059344.

The previous prime is 12011220197. The next prime is 12011220223. The reversal of 12011220198 is 89102211021.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011220197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4221933 + ... + 4224776.

It is an arithmetic number, because the mean of its divisors is an integer number (1098072300).

Almost surely, 2^12011220198 is an apocalyptic number.

12011220198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12011220198 is an abundant number, since it is smaller than the sum of its proper divisors (14342515002).

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

12011220198 is a wasteful number, since it uses less digits than its factorization.

12011220198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8446796 (or 8446793 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The spelling of 12011220198 in words is "twelve billion, eleven million, two hundred twenty thousand, one hundred ninety-eight".