220111111101020 has 96 divisors (see below), whose sum is σ = 486858814783488. Its totient is φ = 83425822295552.

The previous prime is 220111111101001. The next prime is 220111111101029. The reversal of 220111111101020 is 20101111111022.

It is a junction number, because it is equal to n+sod(n) for n = 220111111100986 and 220111111101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111111101029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1360704464 + ... + 1360866216.

It is an arithmetic number, because the mean of its divisors is an integer number (5071445987328).

Almost surely, 2^{220111111101020} is an apocalyptic number.

220111111101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220111111101020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243429407391744).

220111111101020 is an abundant number, since it is smaller than the sum of its proper divisors (266747703682468).

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

220111111101020 is a wasteful number, since it uses less digits than its factorization.

220111111101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189539 (or 189537 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 220111111101020 its reverse (20101111111022), we get a palindrome (240212222212042).

The spelling of 220111111101020 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, twenty".