111212210202220 has 24 divisors (see below), whose sum is σ = 234033210633600. Its totient is φ = 44392013755392.

The previous prime is 111212210202193. The next prime is 111212210202229. The reversal of 111212210202220 is 22202012212111.

It is not an unprimeable number, because it can be changed into a prime (111212210202229) 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, 5804385525 + ... + 5804404684.

It is an arithmetic number, because the mean of its divisors is an integer number (9751383776400).

Almost surely, 2^{111212210202220} is an apocalyptic number.

111212210202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212210202220 is an abundant number, since it is smaller than the sum of its proper divisors (122821000431380).

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

111212210202220 is a wasteful number, since it uses less digits than its factorization.

111212210202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11608790697 (or 11608790695 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 111212210202220 its reverse (22202012212111), we get a palindrome (133414222414331).

The spelling of 111212210202220 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred ten million, two hundred two thousand, two hundred twenty".