121121220200212 has 48 divisors (see below), whose sum is σ = 224898598649088. Its totient is φ = 56879349524480.

The previous prime is 121121220200177. The next prime is 121121220200213. The reversal of 121121220200212 is 212002022121121.

It is a self number, because there is not a number n which added to its sum of digits gives 121121220200212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121220200213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785776293 + ... + 785930419.

It is an arithmetic number, because the mean of its divisors is an integer number (4685387471856).

Almost surely, 2^{121121220200212} is an apocalyptic number.

It is an amenable number.

121121220200212 is a deficient number, since it is larger than the sum of its proper divisors (103777378448876).

121121220200212 is a wasteful number, since it uses less digits than its factorization.

121121220200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178176 (or 178174 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121121220200212 its reverse (212002022121121), we get a palindrome (333123242321333).

The spelling of 121121220200212 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, two hundred thousand, two hundred twelve".