121220210212 has 12 divisors (see below), whose sum is σ = 212527488796. Its totient is φ = 60498070560.

The previous prime is 121220210207. The next prime is 121220210219. The reversal of 121220210212 is 212012022121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36612526336 + 84607683876 = 191344^2 + 290874^2 .

It is not an unprimeable number, because it can be changed into a prime (121220210219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28006203 + ... + 28010530.

Almost surely, 2^121220210212 is an apocalyptic number.

It is an amenable number.

121220210212 is a deficient number, since it is larger than the sum of its proper divisors (91307278584).

121220210212 is a wasteful number, since it uses less digits than its factorization.

121220210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56017278 (or 56017276 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121220210212 its reverse (212012022121), we get a palindrome (333232232333).

The spelling of 121220210212 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, two hundred twelve".