20012211002220 has 96 divisors (see below), whose sum is σ = 57848685404160. Its totient is φ = 5163821902080.

The previous prime is 20012211002153. The next prime is 20012211002227. The reversal of 20012211002220 is 2220011221002.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20012211002220.

It is not an unprimeable number, because it can be changed into a prime (20012211002227) 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, 14962269 + ... + 16244811.

It is an arithmetic number, because the mean of its divisors is an integer number (602590472960).

Almost surely, 2^{20012211002220} is an apocalyptic number.

20012211002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012211002220 is an abundant number, since it is smaller than the sum of its proper divisors (37836474401940).

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

20012211002220 is a wasteful number, since it uses less digits than its factorization.

20012211002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290975 (or 1290973 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20012211002220 its reverse (2220011221002), we get a palindrome (22232222223222).

The spelling of 20012211002220 in words is "twenty trillion, twelve billion, two hundred eleven million, two thousand, two hundred twenty".