121211220212 has 12 divisors (see below), whose sum is σ = 212555202720. Its totient is φ = 60481162296.

The previous prime is 121211220203. The next prime is 121211220223. The reversal of 121211220212 is 212022112121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31109762 + ... + 31113657.

It is an arithmetic number, because the mean of its divisors is an integer number (17712933560).

Almost surely, 2^121211220212 is an apocalyptic number.

It is an amenable number.

121211220212 is a deficient number, since it is larger than the sum of its proper divisors (91343982508).

121211220212 is a wasteful number, since it uses less digits than its factorization.

121211220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62223910 (or 62223908 counting only the distinct ones).

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

Adding to 121211220212 its reverse (212022112121), we get a palindrome (333233332333).

The spelling of 121211220212 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, two hundred twelve".