201210011221220 has 24 divisors (see below), whose sum is σ = 432367558998144. Its totient is φ = 78612283453536.

The previous prime is 201210011221181. The next prime is 201210011221231. The reversal of 201210011221220 is 22122110012102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116982563804 + ... + 116982565523.

It is an arithmetic number, because the mean of its divisors is an integer number (18015314958256).

Almost surely, 2^{201210011221220} is an apocalyptic number.

201210011221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201210011221220 is an abundant number, since it is smaller than the sum of its proper divisors (231157547776924).

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

201210011221220 is a wasteful number, since it uses less digits than its factorization.

201210011221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233965129379 (or 233965129377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201210011221220 its reverse (22122110012102), we get a palindrome (223332121233322).

The spelling of 201210011221220 in words is "two hundred one trillion, two hundred ten billion, eleven million, two hundred twenty-one thousand, two hundred twenty".