101440420443 has 16 divisors (see below), whose sum is σ = 158191689600. Its totient is φ = 64067633640.

The previous prime is 101440420439. The next prime is 101440420451. The reversal of 101440420443 is 344024044101.

101440420443 is a `hidden beast` number, since 1 + 0 + 14 + 404 + 204 + 43 = 666.

It is not a de Polignac number, because 101440420443 - 2² = 101440420439 is a prime.

It is a super-2 number, since 2×101440420443² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (101440420463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98869293 + ... + 98870318.

It is an arithmetic number, because the mean of its divisors is an integer number (9886980600).

Almost surely, 2^101440420443 is an apocalyptic number.

101440420443 is a deficient number, since it is larger than the sum of its proper divisors (56751269157).

101440420443 is a wasteful number, since it uses less digits than its factorization.

101440420443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197739639 (or 197739633 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 101440420443 its reverse (344024044101), we get a palindrome (445464464544).

The spelling of 101440420443 in words is "one hundred one billion, four hundred forty million, four hundred twenty thousand, four hundred forty-three".