201101221222220 has 72 divisors (see below), whose sum is σ = 468790791087024. Its totient is φ = 72403679920000.

The previous prime is 201101221222183. The next prime is 201101221222241. The reversal of 201101221222220 is 22222122101102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 201101221222192 and 201101221222201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411140126 + ... + 411628965.

It is an arithmetic number, because the mean of its divisors is an integer number (6510983209542).

Almost surely, 2^{201101221222220} is an apocalyptic number.

201101221222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201101221222220 is an abundant number, since it is smaller than the sum of its proper divisors (267689569864804).

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

201101221222220 is a wasteful number, since it uses less digits than its factorization.

201101221222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822769223 (or 822769210 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 201101221222220 its reverse (22222122101102), we get a palindrome (223323343323322).

It can be divided in two parts, 2011012 and 21222220, that added together give a palindrome (23233232).

The spelling of 201101221222220 in words is "two hundred one trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".