121212110010220 has 48 divisors (see below), whose sum is σ = 268411810867200. Its totient is φ = 45852566927040.

The previous prime is 121212110010197. The next prime is 121212110010293. The reversal of 121212110010220 is 22010011212121.

It is a super-2 number, since 2×121212110010220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121212110010194 and 121212110010203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279099340 + ... + 279533299.

It is an arithmetic number, because the mean of its divisors is an integer number (5591912726400).

Almost surely, 2^{121212110010220} is an apocalyptic number.

121212110010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212110010220 is an abundant number, since it is smaller than the sum of its proper divisors (147199700856980).

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

121212110010220 is a wasteful number, since it uses less digits than its factorization.

121212110010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558633238 (or 558633236 counting only the distinct ones).

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

Adding to 121212110010220 its reverse (22010011212121), we get a palindrome (143222121222341).

The spelling of 121212110010220 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred ten million, ten thousand, two hundred twenty".