201121001010220 has 48 divisors (see below), whose sum is σ = 435371578145280. Its totient is φ = 78000874960064.

The previous prime is 201121001010169. The next prime is 201121001010227. The reversal of 201121001010220 is 22010100121102.

201121001010220 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 201121001010220.

It is not an unprimeable number, because it can be changed into a prime (201121001010227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 999705550 + ... + 999906709.

It is an arithmetic number, because the mean of its divisors is an integer number (9070241211360).

Almost surely, 2^{201121001010220} is an apocalyptic number.

201121001010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121001010220 is an abundant number, since it is smaller than the sum of its proper divisors (234250577135060).

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

201121001010220 is a wasteful number, since it uses less digits than its factorization.

201121001010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999612422 (or 1999612420 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201121001010220 its reverse (22010100121102), we get a palindrome (223131101131322).

The spelling of 201121001010220 in words is "two hundred one trillion, one hundred twenty-one billion, one million, ten thousand, two hundred twenty".