121203213208 has 128 divisors (see below), whose sum is σ = 287877680640. Its totient is φ = 46857782400.

The previous prime is 121203213167. The next prime is 121203213221. The reversal of 121203213208 is 802312302121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9758010 + ... + 9770422.

It is an arithmetic number, because the mean of its divisors is an integer number (2249044380).

Almost surely, 2^121203213208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121203213208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143938840320).

121203213208 is an abundant number, since it is smaller than the sum of its proper divisors (166674467432).

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

121203213208 is a wasteful number, since it uses less digits than its factorization.

121203213208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12590 (or 12564 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 121203213208 its reverse (802312302121), we get a palindrome (923515515329).

The spelling of 121203213208 in words is "one hundred twenty-one billion, two hundred three million, two hundred thirteen thousand, two hundred eight".