121012313023220 has 24 divisors (see below), whose sum is σ = 254127025799304. Its totient is φ = 48404702647296.

The previous prime is 121012313023171. The next prime is 121012313023229. The reversal of 121012313023220 is 22320313210121.

It can be written as a sum of positive squares in 4 ways, for example, as 4842631557604 + 116169681465616 = 2200598^2 + 10778204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012313023229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9416177 + ... + 18184856.

It is an arithmetic number, because the mean of its divisors is an integer number (10588626074971).

Almost surely, 2^{121012313023220} is an apocalyptic number.

121012313023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012313023220 is an abundant number, since it is smaller than the sum of its proper divisors (133114712776084).

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

121012313023220 is a wasteful number, since it uses less digits than its factorization.

121012313023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27820259 (or 27820257 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 121012313023220 its reverse (22320313210121), we get a palindrome (143332626233341).

The spelling of 121012313023220 in words is "one hundred twenty-one trillion, twelve billion, three hundred thirteen million, twenty-three thousand, two hundred twenty".