201101221222020 has 144 divisors (see below), whose sum is σ = 698990350181760. Its totient is φ = 45844711008768.

The previous prime is 201101221222009. The next prime is 201101221222067. The reversal of 201101221222020 is 20222122101102.

It is a happy number.

201101221222020 is a `hidden beast` number, since 201 + 1 + 0 + 1 + 221 + 2 + 220 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201101221221984 and 201101221222002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 210082017 + ... + 211037096.

It is an arithmetic number, because the mean of its divisors is an integer number (4854099654040).

Almost surely, 2^{201101221222020} is an apocalyptic number.

201101221222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201101221222020 is an abundant number, since it is smaller than the sum of its proper divisors (497889128959740).

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

201101221222020 is a wasteful number, since it uses less digits than its factorization.

201101221222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421119514 (or 421119509 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201101221222020 its reverse (20222122101102), we get a palindrome (221323343323122).

The spelling of 201101221222020 in words is "two hundred one trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty".