201121220212210 has 64 divisors (see below), whose sum is σ = 382131130550400. Its totient is φ = 76002781151232.

The previous prime is 201121220212207. The next prime is 201121220212217. The reversal of 201121220212210 is 12212022121102.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (201121220212217) 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 31 ways as a sum of consecutive naturals, for example, 97899849 + ... + 99933091.

It is an arithmetic number, because the mean of its divisors is an integer number (5970798914850).

Almost surely, 2^{201121220212210} is an apocalyptic number.

201121220212210 is a deficient number, since it is larger than the sum of its proper divisors (181009910338190).

201121220212210 is a wasteful number, since it uses less digits than its factorization.

201121220212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034715.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201121220212210 its reverse (12212022121102), we get a palindrome (213333242333312).

The spelling of 201121220212210 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, two hundred ten".