121211220300 has 72 divisors (see below), whose sum is σ = 350812702800. Its totient is φ = 32313016320.

The previous prime is 121211220289. The next prime is 121211220343. The reversal of 121211220300 is 3022112121.

It is a super-3 number, since 3×121211220300³ (a number of 34 digits) contains 333 as substring.

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 121211220300.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 938016 + ... + 1059384.

It is an arithmetic number, because the mean of its divisors is an integer number (4872398650).

Almost surely, 2^121211220300 is an apocalyptic number.

121211220300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211220300 is an abundant number, since it is smaller than the sum of its proper divisors (229601482500).

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

121211220300 is a wasteful number, since it uses less digits than its factorization.

121211220300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124715 (or 124708 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121211220300 its reverse (3022112121), we get a palindrome (124233332421).

The spelling of 121211220300 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, three hundred".