201021101002220 has 48 divisors (see below), whose sum is σ = 422474592008448. Its totient is φ = 80345542791360.

The previous prime is 201021101002217. The next prime is 201021101002229. The reversal of 201021101002220 is 22200101120102.

It is a junction number, because it is equal to n+sod(n) for n = 201021101002195 and 201021101002204.

It is not an unprimeable number, because it can be changed into a prime (201021101002229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253058579 + ... + 253851701.

It is an arithmetic number, because the mean of its divisors is an integer number (8801554000176).

Almost surely, 2^{201021101002220} is an apocalyptic number.

201021101002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201021101002220 is an abundant number, since it is smaller than the sum of its proper divisors (221453491006228).

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

201021101002220 is a wasteful number, since it uses less digits than its factorization.

201021101002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803030 (or 803028 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201021101002220 its reverse (22200101120102), we get a palindrome (223221202122322).

The spelling of 201021101002220 in words is "two hundred one trillion, twenty-one billion, one hundred one million, two thousand, two hundred twenty".