111211222020 has 24 divisors (see below), whose sum is σ = 311391421824. Its totient is φ = 29656325856.

The previous prime is 111211221977. The next prime is 111211222049. The reversal of 111211222020 is 20222112111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926760124 + ... + 926760243.

It is an arithmetic number, because the mean of its divisors is an integer number (12974642576).

Almost surely, 2^111211222020 is an apocalyptic number.

111211222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211222020 is an abundant number, since it is smaller than the sum of its proper divisors (200180199804).

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

111211222020 is a wasteful number, since it uses less digits than its factorization.

111211222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853520379 (or 1853520377 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111211222020 its reverse (20222112111), we get a palindrome (131433334131).

The spelling of 111211222020 in words is "one hundred eleven billion, two hundred eleven million, two hundred twenty-two thousand, twenty".