121022212212 has 288 divisors, whose sum is σ = 353129342720. Its totient is φ = 35805369600.

The previous prime is 121022212189. The next prime is 121022212217. The reversal of 121022212212 is 212212220121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022212217) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 125151753 + ... + 125152719.

Almost surely, 2^121022212212 is an apocalyptic number.

121022212212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121022212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176564671360).

121022212212 is an abundant number, since it is smaller than the sum of its proper divisors (232107130508).

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

121022212212 is a wasteful number, since it uses less digits than its factorization.

121022212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220 (or 1201 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121022212212 its reverse (212212220121), we get a palindrome (333234432333).

The spelling of 121022212212 in words is "one hundred twenty-one billion, twenty-two million, two hundred twelve thousand, two hundred twelve".