201100212220 has 48 divisors (see below), whose sum is σ = 438146489088. Its totient is φ = 77450042880.

The previous prime is 201100212169. The next prime is 201100212239. The reversal of 201100212220 is 22212001102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201100212220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701097 + ... + 945376.

It is an arithmetic number, because the mean of its divisors is an integer number (9128051856).

Almost surely, 2^201100212220 is an apocalyptic number.

201100212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201100212220 is an abundant number, since it is smaller than the sum of its proper divisors (237046276868).

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

201100212220 is a wasteful number, since it uses less digits than its factorization.

201100212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646710 (or 1646708 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201100212220 its reverse (22212001102), we get a palindrome (223312213322).

The spelling of 201100212220 in words is "two hundred one billion, one hundred million, two hundred twelve thousand, two hundred twenty".