21003311200124 has 12 divisors (see below), whose sum is σ = 40097230473048. Its totient is φ = 9546959636400.

The previous prime is 21003311200099. The next prime is 21003311200129. The reversal of 21003311200124 is 42100211330012.

It is a super-2 number, since 2×21003311200124² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003311200096 and 21003311200105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003311200129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238673990867 + ... + 238673990954.

It is an arithmetic number, because the mean of its divisors is an integer number (3341435872754).

Almost surely, 2^{21003311200124} is an apocalyptic number.

It is an amenable number.

21003311200124 is a deficient number, since it is larger than the sum of its proper divisors (19093919272924).

21003311200124 is a wasteful number, since it uses less digits than its factorization.

21003311200124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477347981836 (or 477347981834 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21003311200124 its reverse (42100211330012), we get a palindrome (63103522530136).

The spelling of 21003311200124 in words is "twenty-one trillion, three billion, three hundred eleven million, two hundred thousand, one hundred twenty-four".