111211122012220 has 12 divisors (see below), whose sum is σ = 233543356225704. Its totient is φ = 44484448804880.

The previous prime is 111211122012203. The next prime is 111211122012223. The reversal of 111211122012220 is 22210221112111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211122012223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780278050286 + ... + 2780278050325.

It is an arithmetic number, because the mean of its divisors is an integer number (19461946352142).

Almost surely, 2^{111211122012220} is an apocalyptic number.

111211122012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211122012220 is an abundant number, since it is smaller than the sum of its proper divisors (122332234213484).

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

111211122012220 is a wasteful number, since it uses less digits than its factorization.

111211122012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560556100620 (or 5560556100618 counting only the distinct ones).

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

Adding to 111211122012220 its reverse (22210221112111), we get a palindrome (133421343124331).

The spelling of 111211122012220 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred twenty-two million, twelve thousand, two hundred twenty".