20123051212 has 24 divisors (see below), whose sum is σ = 38448248832. Its totient is φ = 9139338000.

The previous prime is 20123051209. The next prime is 20123051237. The reversal of 20123051212 is 21215032102.

It is a self number, because there is not a number n which added to its sum of digits gives 20123051212.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 133164 + ... + 240787.

It is an arithmetic number, because the mean of its divisors is an integer number (1602010368).

Almost surely, 2^20123051212 is an apocalyptic number.

20123051212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20123051212 is a deficient number, since it is larger than the sum of its proper divisors (18325197620).

20123051212 is a wasteful number, since it uses less digits than its factorization.

20123051212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375189 (or 375187 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20123051212 its reverse (21215032102), we get a palindrome (41338083314).

The spelling of 20123051212 in words is "twenty billion, one hundred twenty-three million, fifty-one thousand, two hundred twelve".