20121252212 has 12 divisors (see below), whose sum is σ = 36348068736. Its totient is φ = 9736089720.

The previous prime is 20121252211. The next prime is 20121252269. The reversal of 20121252212 is 21225212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121252211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81133958 + ... + 81134205.

It is an arithmetic number, because the mean of its divisors is an integer number (3029005728).

Almost surely, 2^20121252212 is an apocalyptic number.

It is an amenable number.

20121252212 is a deficient number, since it is larger than the sum of its proper divisors (16226816524).

20121252212 is a wasteful number, since it uses less digits than its factorization.

20121252212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162268198 (or 162268196 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20121252212 its reverse (21225212102), we get a palindrome (41346464314).

The spelling of 20121252212 in words is "twenty billion, one hundred twenty-one million, two hundred fifty-two thousand, two hundred twelve".