121130223220 has 24 divisors (see below), whose sum is σ = 254940021000. Its totient is φ = 48344174592.

The previous prime is 121130223209. The next prime is 121130223239. The reversal of 121130223220 is 22322031121.

It can be written as a sum of positive squares in 4 ways, for example, as 14620679056 + 106509544164 = 120916^2 + 326358^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6735465 + ... + 6753424.

It is an arithmetic number, because the mean of its divisors is an integer number (10622500875).

Almost surely, 2^121130223220 is an apocalyptic number.

121130223220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121130223220 is an abundant number, since it is smaller than the sum of its proper divisors (133809797780).

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

121130223220 is a wasteful number, since it uses less digits than its factorization.

121130223220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489347 (or 13489345 counting only the distinct ones).

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

Adding to 121130223220 its reverse (22322031121), we get a palindrome (143452254341).

The spelling of 121130223220 in words is "one hundred twenty-one billion, one hundred thirty million, two hundred twenty-three thousand, two hundred twenty".