121212032320 has 56 divisors (see below), whose sum is σ = 290743090344. Its totient is φ = 48130891776.

The previous prime is 121212032311. The next prime is 121212032321. The reversal of 121212032320 is 23230212121.

It can be written as a sum of positive squares in 4 ways, for example, as 10759497984 + 110452534336 = 103728^2 + 332344^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212032321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338597 + ... + 1426276.

It is an arithmetic number, because the mean of its divisors is an integer number (5191840899).

Almost surely, 2^121212032320 is an apocalyptic number.

121212032320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212032320 is an abundant number, since it is smaller than the sum of its proper divisors (169531058024).

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

121212032320 is a wasteful number, since it uses less digits than its factorization.

121212032320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765027 (or 2765017 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121212032320 its reverse (23230212121), we get a palindrome (144442244441).

The spelling of 121212032320 in words is "one hundred twenty-one billion, two hundred twelve million, thirty-two thousand, three hundred twenty".