20121244412 has 12 divisors (see below), whose sum is σ = 35337489936. Its totient is φ = 10024818720.

The previous prime is 20121244379. The next prime is 20121244433. The reversal of 20121244412 is 21444212102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8949608 + ... + 8951855.

It is an arithmetic number, because the mean of its divisors is an integer number (2944790828).

Almost surely, 2^20121244412 is an apocalyptic number.

It is an amenable number.

20121244412 is a deficient number, since it is larger than the sum of its proper divisors (15216245524).

20121244412 is a wasteful number, since it uses less digits than its factorization.

20121244412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17901748 (or 17901746 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 20121244412 its reverse (21444212102), we get a palindrome (41565456514).

The spelling of 20121244412 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, four hundred twelve".