20121244002 has 24 divisors (see below), whose sum is σ = 43601950080. Its totient is φ = 6706170360.

The previous prime is 20121243917. The next prime is 20121244027. The reversal of 20121244002 is 20044212102.

20121244002 is a `hidden beast` number, since 201 + 21 + 2 + 440 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 67627 + ... + 211697.

It is an arithmetic number, because the mean of its divisors is an integer number (1816747920).

Almost surely, 2^20121244002 is an apocalyptic number.

20121244002 is an abundant number, since it is smaller than the sum of its proper divisors (23480706078).

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

20121244002 is a wasteful number, since it uses less digits than its factorization.

20121244002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151838 (or 151835 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20121244002 its reverse (20044212102), we get a palindrome (40165456104).

The spelling of 20121244002 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, two".