201111020220 has 384 divisors, whose sum is σ = 634544160768. Its totient is φ = 47184768000.

The previous prime is 201111020207. The next prime is 201111020233. The reversal of 201111020220 is 22020111102.

It is an interprime number because it is at equal distance from previous prime (201111020207) and next prime (201111020233).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 201111020196 and 201111020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 901843029 + ... + 901843251.

It is an arithmetic number, because the mean of its divisors is an integer number (1652458752).

Almost surely, 2^201111020220 is an apocalyptic number.

201111020220 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 201111020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317272080384).

201111020220 is an abundant number, since it is smaller than the sum of its proper divisors (433433140548).

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

201111020220 is a wasteful number, since it uses less digits than its factorization.

201111020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201111020220 its reverse (22020111102), we get a palindrome (223131131322).

The spelling of 201111020220 in words is "two hundred one billion, one hundred eleven million, twenty thousand, two hundred twenty".