121220201220212 has 48 divisors (see below), whose sum is σ = 220493907896640. Its totient is φ = 58242400489728.

The previous prime is 121220201220169. The next prime is 121220201220263. The reversal of 121220201220212 is 212022102022121.

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, 20749883 + ... + 25942205.

It is an arithmetic number, because the mean of its divisors is an integer number (4593623081180).

Almost surely, 2^{121220201220212} is an apocalyptic number.

It is an amenable number.

121220201220212 is a deficient number, since it is larger than the sum of its proper divisors (99273706676428).

121220201220212 is a wasteful number, since it uses less digits than its factorization.

121220201220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193312 (or 5193310 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121220201220212 its reverse (212022102022121), we get a palindrome (333242303242333).

The spelling of 121220201220212 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred one million, two hundred twenty thousand, two hundred twelve".