201122121210 has 64 divisors (see below), whose sum is σ = 487825027200. Its totient is φ = 53062705152.

The previous prime is 201122121199. The next prime is 201122121217. The reversal of 201122121210 is 12121221102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 201122121210.

It is not an unprimeable number, because it can be changed into a prime (201122121217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10987746 + ... + 11006034.

It is an arithmetic number, because the mean of its divisors is an integer number (7622266050).

Almost surely, 2^201122121210 is an apocalyptic number.

201122121210 is an abundant number, since it is smaller than the sum of its proper divisors (286702905990).

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

201122121210 is a wasteful number, since it uses less digits than its factorization.

201122121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22175.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201122121210 its reverse (12121221102), we get a palindrome (213243342312).

The spelling of 201122121210 in words is "two hundred one billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred ten".