121233212120 has 32 divisors (see below), whose sum is σ = 272828682000. Its totient is φ = 48483692928.

The previous prime is 121233212101. The next prime is 121233212143. The reversal of 121233212120 is 21212332121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121233212092 and 121233212101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93239 + ... + 501158.

Almost surely, 2^121233212120 is an apocalyptic number.

121233212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121233212120 is an abundant number, since it is smaller than the sum of its proper divisors (151595469880).

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

121233212120 is a wasteful number, since it uses less digits than its factorization.

121233212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599507 (or 599503 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121233212120 its reverse (21212332121), we get a palindrome (142445544241).

The spelling of 121233212120 in words is "one hundred twenty-one billion, two hundred thirty-three million, two hundred twelve thousand, one hundred twenty".