20121344412 has 48 divisors (see below), whose sum is σ = 50788147200. Its totient is φ = 6163409088.

The previous prime is 20121344393. The next prime is 20121344429. The reversal of 20121344412 is 21444312102.

It is a super-3 number, since 3×20121344412³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 254412 + ... + 323987.

It is an arithmetic number, because the mean of its divisors is an integer number (1058086400).

Almost surely, 2^20121344412 is an apocalyptic number.

It is an amenable number.

20121344412 is an abundant number, since it is smaller than the sum of its proper divisors (30666802788).

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

20121344412 is a wasteful number, since it uses less digits than its factorization.

20121344412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578642 (or 578640 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 20121344412 its reverse (21444312102), we get a palindrome (41565656514).

The spelling of 20121344412 in words is "twenty billion, one hundred twenty-one million, three hundred forty-four thousand, four hundred twelve".