121221202202212 has 12 divisors (see below), whose sum is σ = 242442404404480. Its totient is φ = 51951943800936.

The previous prime is 121221202202159. The next prime is 121221202202213. The reversal of 121221202202212 is 212202202122121.

121221202202212 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (121221202202213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164664325012 + ... + 2164664325067.

Almost surely, 2^{121221202202212} is an apocalyptic number.

It is an amenable number.

121221202202212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121221202202212 is a wasteful number, since it uses less digits than its factorization.

121221202202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329328650090 (or 4329328650088 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 121221202202212 its reverse (212202202122121), we get a palindrome (333423404324333).

The spelling of 121221202202212 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, two hundred two thousand, two hundred twelve".