111201212210220 has 72 divisors (see below), whose sum is σ = 367974920411280. Its totient is φ = 26957869626240.

The previous prime is 111201212210189. The next prime is 111201212210227. The reversal of 111201212210220 is 22012212102111.

111201212210220 is a `hidden beast` number, since 1 + 1 + 1 + 20 + 1 + 212 + 210 + 220 = 666.

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 = 111201212210193 and 111201212210202.

It is not an unprimeable number, because it can be changed into a prime (111201212210227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28081112215 + ... + 28081116174.

It is an arithmetic number, because the mean of its divisors is an integer number (5110762783490).

Almost surely, 2^{111201212210220} is an apocalyptic number.

111201212210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201212210220 is an abundant number, since it is smaller than the sum of its proper divisors (256773708201060).

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

111201212210220 is a wasteful number, since it uses less digits than its factorization.

111201212210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56162228415 (or 56162228410 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111201212210220 its reverse (22012212102111), we get a palindrome (133213424312331).

The spelling of 111201212210220 in words is "one hundred eleven trillion, two hundred one billion, two hundred twelve million, two hundred ten thousand, two hundred twenty".