121232221312240 has 160 divisors (see below), whose sum is σ = 314417066644800. Its totient is φ = 43274605731840.

The previous prime is 121232221312229. The next prime is 121232221312247. The reversal of 121232221312240 is 42213122232121.

It is a super-3 number, since 3×121232221312240³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121232221312199 and 121232221312208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121232221312247) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 31732687 + ... + 35347246.

It is an arithmetic number, because the mean of its divisors is an integer number (1965106666530).

Almost surely, 2^{121232221312240} is an apocalyptic number.

121232221312240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121232221312240 is an abundant number, since it is smaller than the sum of its proper divisors (193184845332560).

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

121232221312240 is a wasteful number, since it uses less digits than its factorization.

121232221312240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67080035 (or 67080029 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 121232221312240 its reverse (42213122232121), we get a palindrome (163445343544361).

The spelling of 121232221312240 in words is "one hundred twenty-one trillion, two hundred thirty-two billion, two hundred twenty-one million, three hundred twelve thousand, two hundred forty".