201122210121210 has 80 divisors (see below), whose sum is σ = 618051744135936. Its totient is φ = 45970790883552.

The previous prime is 201122210121187. The next prime is 201122210121211. The reversal of 201122210121210 is 12121012221102.

201122210121210 is a `hidden beast` number, since 2 + 0 + 1 + 122 + 210 + 121 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201122210121211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17735638962 + ... + 17735650301.

Almost surely, 2^{201122210121210} is an apocalyptic number.

201122210121210 is an abundant number, since it is smaller than the sum of its proper divisors (416929534014726).

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

201122210121210 is a wasteful number, since it uses less digits than its factorization.

201122210121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35471289289 (or 35471289280 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201122210121210 its reverse (12121012221102), we get a palindrome (213243222342312).

The spelling of 201122210121210 in words is "two hundred one trillion, one hundred twenty-two billion, two hundred ten million, one hundred twenty-one thousand, two hundred ten".