12121122120212 has 36 divisors (see below), whose sum is σ = 24777528034644. Its totient is φ = 5173211554560.

The previous prime is 12121122120139. The next prime is 12121122120223. The reversal of 12121122120212 is 21202122112121.

It can be written as a sum of positive squares in 2 ways, for example, as 10141906452496 + 1979215667716 = 3184636^2 + 1406846^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128256623 + ... + 128351094.

It is an arithmetic number, because the mean of its divisors is an integer number (688264667629).

Almost surely, 2^{12121122120212} is an apocalyptic number.

It is an amenable number.

12121122120212 is an abundant number, since it is smaller than the sum of its proper divisors (12656405914432).

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

12121122120212 is a wasteful number, since it uses less digits than its factorization.

12121122120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256607976 (or 256607967 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12121122120212 its reverse (21202122112121), we get a palindrome (33323244232333).

The spelling of 12121122120212 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twelve".