21011452031224 has 8 divisors (see below), whose sum is σ = 39396472558560. Its totient is φ = 10505726015608.

The previous prime is 21011452031183. The next prime is 21011452031243. The reversal of 21011452031224 is 42213025411012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21011452031224² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21011452031192 and 21011452031201.

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 as a sum of consecutive naturals, namely, 1313215751944 + ... + 1313215751959.

It is an arithmetic number, because the mean of its divisors is an integer number (4924559069820).

Almost surely, 2^{21011452031224} is an apocalyptic number.

It is an amenable number.

21011452031224 is a deficient number, since it is larger than the sum of its proper divisors (18385020527336).

21011452031224 is a wasteful number, since it uses less digits than its factorization.

21011452031224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626431503909 (or 2626431503905 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 21011452031224 its reverse (42213025411012), we get a palindrome (63224477442236).

The spelling of 21011452031224 in words is "twenty-one trillion, eleven billion, four hundred fifty-two million, thirty-one thousand, two hundred twenty-four".