20120012220 has 192 divisors, whose sum is σ = 73291309056. Its totient is φ = 3998987520.

The previous prime is 20120012219. The next prime is 20120012233. The reversal of 20120012220 is 2221002102.

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 = 20120012196 and 20120012205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11587 + ... + 200933.

It is an arithmetic number, because the mean of its divisors is an integer number (381725568).

Almost surely, 2^20120012220 is an apocalyptic number.

20120012220 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 20120012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36645654528).

20120012220 is an abundant number, since it is smaller than the sum of its proper divisors (53171296836).

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

20120012220 is a wasteful number, since it uses less digits than its factorization.

20120012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189400 (or 189398 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20120012220 its reverse (2221002102), we get a palindrome (22341014322).

The spelling of 20120012220 in words is "twenty billion, one hundred twenty million, twelve thousand, two hundred twenty".