121221001212 has 48 divisors (see below), whose sum is σ = 292275914112. Its totient is φ = 39073700160.

The previous prime is 121221001207. The next prime is 121221001247. The reversal of 121221001212 is 212100122121.

It is a super-2 number, since 2×121221001212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121221001191 and 121221001200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765114 + ... + 909857.

It is an arithmetic number, because the mean of its divisors is an integer number (6089081544).

Almost surely, 2^121221001212 is an apocalyptic number.

121221001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121221001212 is an abundant number, since it is smaller than the sum of its proper divisors (171054912900).

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

121221001212 is a wasteful number, since it uses less digits than its factorization.

121221001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675178 (or 1675176 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121221001212 its reverse (212100122121), we get a palindrome (333321123333).

The spelling of 121221001212 in words is "one hundred twenty-one billion, two hundred twenty-one million, one thousand, two hundred twelve".