121210102011220 has 24 divisors (see below), whose sum is σ = 269514226825704. Its totient is φ = 45632038404096.

The previous prime is 121210102011137. The next prime is 121210102011221. The reversal of 121210102011220 is 22110201012121.

It can be written as a sum of positive squares in 4 ways, for example, as 36796307472016 + 84413794539204 = 6065996^2 + 9187698^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121210102011194 and 121210102011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210102011221) 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, 178250149677 + ... + 178250150356.

It is an arithmetic number, because the mean of its divisors is an integer number (11229759451071).

Almost surely, 2^{121210102011220} is an apocalyptic number.

121210102011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210102011220 is an abundant number, since it is smaller than the sum of its proper divisors (148304124814484).

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

121210102011220 is a wasteful number, since it uses less digits than its factorization.

121210102011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356500300059 (or 356500300057 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121210102011220 its reverse (22110201012121), we get a palindrome (143320303023341).

Subtracting from 121210102011220 its reverse (22110201012121), we obtain a palindrome (99099900999099).

The spelling of 121210102011220 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred two million, eleven thousand, two hundred twenty".