121213001223210 has 128 divisors (see below), whose sum is σ = 316658678482944. Its totient is φ = 29517817109760.

The previous prime is 121213001223199. The next prime is 121213001223253. The reversal of 121213001223210 is 12322100312121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9332257 + ... + 18152603.

It is an arithmetic number, because the mean of its divisors is an integer number (2473895925648).

Almost surely, 2^{121213001223210} is an apocalyptic number.

121213001223210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121213001223210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158329339241472).

121213001223210 is an abundant number, since it is smaller than the sum of its proper divisors (195445677259734).

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

121213001223210 is a wasteful number, since it uses less digits than its factorization.

121213001223210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820748.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121213001223210 its reverse (12322100312121), we get a palindrome (133535101535331).

The spelling of 121213001223210 in words is "one hundred twenty-one trillion, two hundred thirteen billion, one million, two hundred twenty-three thousand, two hundred ten".