121313232220 has 12 divisors (see below), whose sum is σ = 254757787704. Its totient is φ = 48525292880.

The previous prime is 121313232193. The next prime is 121313232223. The reversal of 121313232220 is 22232313121.

It is a super-2 number, since 2×121313232220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121313232191 and 121313232200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313232223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3032830786 + ... + 3032830825.

It is an arithmetic number, because the mean of its divisors is an integer number (21229815642).

Almost surely, 2^121313232220 is an apocalyptic number.

121313232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121313232220 is an abundant number, since it is smaller than the sum of its proper divisors (133444555484).

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

121313232220 is a wasteful number, since it uses less digits than its factorization.

121313232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6065661620 (or 6065661618 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 121313232220 its reverse (22232313121), we get a palindrome (143545545341).

The spelling of 121313232220 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred thirty-two thousand, two hundred twenty".