121212010220 has 48 divisors (see below), whose sum is σ = 291420279360. Its totient is φ = 41485338624.

The previous prime is 121212010201. The next prime is 121212010247. The reversal of 121212010220 is 22010212121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 121212010195 and 121212010204.

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, 681149 + ... + 840468.

It is an arithmetic number, because the mean of its divisors is an integer number (6071255820).

Almost surely, 2^121212010220 is an apocalyptic number.

121212010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212010220 is an abundant number, since it is smaller than the sum of its proper divisors (170208269140).

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

121212010220 is a wasteful number, since it uses less digits than its factorization.

121212010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522202 (or 1522200 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121212010220 its reverse (22010212121), we get a palindrome (143222222341).

The spelling of 121212010220 in words is "one hundred twenty-one billion, two hundred twelve million, ten thousand, two hundred twenty".