21124002133444 has 36 divisors (see below), whose sum is σ = 43644260298576. Its totient is φ = 8918022217104.

The previous prime is 21124002133433. The next prime is 21124002133469. The reversal of 21124002133444 is 44433120042112.

It is a happy number.

It is a super-2 number, since 2×21124002133444² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 804281802 + ... + 804308065.

Almost surely, 2^{21124002133444} is an apocalyptic number.

It is an amenable number.

21124002133444 is an abundant number, since it is smaller than the sum of its proper divisors (22520258165132).

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

21124002133444 is a wasteful number, since it uses less digits than its factorization.

21124002133444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608589952 (or 1608589943 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21124002133444 its reverse (44433120042112), we get a palindrome (65557122175556).

The spelling of 21124002133444 in words is "twenty-one trillion, one hundred twenty-four billion, two million, one hundred thirty-three thousand, four hundred forty-four".