101002120444 has 12 divisors (see below), whose sum is σ = 186056537800. Its totient is φ = 47843109648.

The previous prime is 101002120399. The next prime is 101002120447. The reversal of 101002120444 is 444021200101.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101002120447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664487559 + ... + 664487710.

Almost surely, 2^101002120444 is an apocalyptic number.

It is an amenable number.

101002120444 is a deficient number, since it is larger than the sum of its proper divisors (85054417356).

101002120444 is a wasteful number, since it uses less digits than its factorization.

101002120444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328975292 (or 1328975290 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 101002120444 its reverse (444021200101), we get a palindrome (545023320545).

The spelling of 101002120444 in words is "one hundred one billion, two million, one hundred twenty thousand, four hundred forty-four".