20211112220 has 144 divisors (see below), whose sum is σ = 47115794880. Its totient is φ = 7276658688.

The previous prime is 20211112151. The next prime is 20211112297. The reversal of 20211112220 is 2221111202.

It is a junction number, because it is equal to n+sod(n) for n = 20211112195 and 20211112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46038761 + ... + 46039199.

It is an arithmetic number, because the mean of its divisors is an integer number (327193020).

Almost surely, 2^20211112220 is an apocalyptic number.

20211112220 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 20211112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23557897440).

20211112220 is an abundant number, since it is smaller than the sum of its proper divisors (26904682660).

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

20211112220 is a wasteful number, since it uses less digits than its factorization.

20211112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20211112220 its reverse (2221111202), we get a palindrome (22432223422).

The spelling of 20211112220 in words is "twenty billion, two hundred eleven million, one hundred twelve thousand, two hundred twenty".