100021421671644 has 48 divisors (see below), whose sum is σ = 254603510219520. Its totient is φ = 30309101744640.

The previous prime is 100021421671607. The next prime is 100021421671651. The reversal of 100021421671644 is 446176124120001.

It is a congruent number.

It is an unprimeable number.

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, 4379497 + ... + 14806175.

It is an arithmetic number, because the mean of its divisors is an integer number (5304239796240).

Almost surely, 2^{100021421671644} is an apocalyptic number.

It is an amenable number.

100021421671644 is an abundant number, since it is smaller than the sum of its proper divisors (154582088547876).

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

100021421671644 is a wasteful number, since it uses less digits than its factorization.

100021421671644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10499370 (or 10499368 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

Adding to 100021421671644 its reverse (446176124120001), we get a palindrome (546197545791645).

The spelling of 100021421671644 in words is "one hundred trillion, twenty-one billion, four hundred twenty-one million, six hundred seventy-one thousand, six hundred forty-four".