121211022212 has 24 divisors (see below), whose sum is σ = 252962134656. Its totient is φ = 49688990208.

The previous prime is 121211022203. The next prime is 121211022221. The reversal of 121211022212 is 212220112121.

It is an interprime number because it is at equal distance from previous prime (121211022203) and next prime (121211022221).

It is a super-2 number, since 2×121211022212² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94107293 + ... + 94108580.

It is an arithmetic number, because the mean of its divisors is an integer number (10540088944).

Almost surely, 2^121211022212 is an apocalyptic number.

It is an amenable number.

121211022212 is an abundant number, since it is smaller than the sum of its proper divisors (131751112444).

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

121211022212 is a wasteful number, since it uses less digits than its factorization.

121211022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188215907 (or 188215905 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121211022212 its reverse (212220112121), we get a palindrome (333431134333).

The spelling of 121211022212 in words is "one hundred twenty-one billion, two hundred eleven million, twenty-two thousand, two hundred twelve".