121201122210 has 48 divisors (see below), whose sum is σ = 338373749376. Its totient is φ = 27703113312.

The previous prime is 121201122199. The next prime is 121201122269. The reversal of 121201122210 is 12221102121.

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 121201122210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41223402 + ... + 41226341.

It is an arithmetic number, because the mean of its divisors is an integer number (7049453112).

Almost surely, 2^121201122210 is an apocalyptic number.

121201122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121201122210 is an abundant number, since it is smaller than the sum of its proper divisors (217172627166).

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

121201122210 is a wasteful number, since it uses less digits than its factorization.

121201122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82449767 (or 82449760 counting only the distinct ones).

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

Adding to 121201122210 its reverse (12221102121), we get a palindrome (133422224331).

The spelling of 121201122210 in words is "one hundred twenty-one billion, two hundred one million, one hundred twenty-two thousand, two hundred ten".