121201221000210 has 128 divisors (see below), whose sum is σ = 335967452593920. Its totient is φ = 27730646701056.

The previous prime is 121201221000203. The next prime is 121201221000221. The reversal of 121201221000210 is 12000122102121.

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 121201221000210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 153913309 + ... + 154698768.

It is an arithmetic number, because the mean of its divisors is an integer number (2624745723390).

Almost surely, 2^{121201221000210} is an apocalyptic number.

121201221000210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121201221000210 is an abundant number, since it is smaller than the sum of its proper divisors (214766231593710).

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

121201221000210 is a wasteful number, since it uses less digits than its factorization.

121201221000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308612172.

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

Adding to 121201221000210 its reverse (12000122102121), we get a palindrome (133201343102331).

The spelling of 121201221000210 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty-one million, two hundred ten", and thus it is an aban number.