21242144124212 has 24 divisors (see below), whose sum is σ = 40872500659200. Its totient is φ = 9579492336960.

The previous prime is 21242144124167. The next prime is 21242144124221.

21242144124212 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

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, 1900687337 + ... + 1900698512.

It is an arithmetic number, because the mean of its divisors is an integer number (1703020860800).

Almost surely, 2^{21242144124212} is an apocalyptic number.

21242144124212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21242144124212 is a deficient number, since it is larger than the sum of its proper divisors (19630356534988).

21242144124212 is a wasteful number, since it uses less digits than its factorization.

21242144124212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801385991 (or 3801385989 counting only the distinct ones).

The product of its digits is 16384, while the sum is 32.

It can be divided in two parts, 2124214 and 4124212, that added together give a palindrome (6248426).

The spelling of 21242144124212 in words is "twenty-one trillion, two hundred forty-two billion, one hundred forty-four million, one hundred twenty-four thousand, two hundred twelve".