20121002012 has 24 divisors (see below), whose sum is σ = 36242055360. Its totient is φ = 9770304960.

The previous prime is 20121002009. The next prime is 20121002039. The reversal of 20121002012 is 21020012102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20121001984 and 20121002002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502643 + ... + 541194.

It is an arithmetic number, because the mean of its divisors is an integer number (1510085640).

Almost surely, 2^20121002012 is an apocalyptic number.

It is an amenable number.

20121002012 is a deficient number, since it is larger than the sum of its proper divisors (16121053348).

20121002012 is a wasteful number, since it uses less digits than its factorization.

20121002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043981 (or 1043979 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20121002012 its reverse (21020012102), we get a palindrome (41141014114).

The spelling of 20121002012 in words is "twenty billion, one hundred twenty-one million, two thousand, twelve".