21444100220502 has 12 divisors (see below), whose sum is σ = 46462217144460. Its totient is φ = 7148033406828.

The previous prime is 21444100220449. The next prime is 21444100220537. The reversal of 21444100220502 is 20502200144412.

It is a happy number.

21444100220502 is a `hidden beast` number, since 2 + 1 + 44 + 410 + 0 + 2 + 205 + 0 + 2 = 666.

It is a super-2 number, since 2×21444100220502² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 595669450552 + ... + 595669450587.

It is an arithmetic number, because the mean of its divisors is an integer number (3871851428705).

Almost surely, 2^{21444100220502} is an apocalyptic number.

21444100220502 is an abundant number, since it is smaller than the sum of its proper divisors (25018116923958).

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

21444100220502 is a wasteful number, since it uses less digits than its factorization.

21444100220502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191338901147 (or 1191338901144 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 21444100220502 its reverse (20502200144412), we get a palindrome (41946300364914).

The spelling of 21444100220502 in words is "twenty-one trillion, four hundred forty-four billion, one hundred million, two hundred twenty thousand, five hundred two".