20102011220 has 12 divisors (see below), whose sum is σ = 42214223604. Its totient is φ = 8040804480.

The previous prime is 20102011217. The next prime is 20102011253. The reversal of 20102011220 is 2211020102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9369465616 + 10732545604 = 96796^2 + 103598^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502550261 + ... + 502550300.

It is an arithmetic number, because the mean of its divisors is an integer number (3517851967).

Almost surely, 2^20102011220 is an apocalyptic number.

20102011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102011220 is an abundant number, since it is smaller than the sum of its proper divisors (22112212384).

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

20102011220 is a wasteful number, since it uses less digits than its factorization.

20102011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005100570 (or 1005100568 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20102011220 its reverse (2211020102), we get a palindrome (22313031322).

The spelling of 20102011220 in words is "twenty billion, one hundred two million, eleven thousand, two hundred twenty".