100001002021021 has 16 divisors (see below), whose sum is σ = 102978520565760. Its totient is φ = 97050469178880.

The previous prime is 100001002020973. The next prime is 100001002021049. The reversal of 100001002021021 is 120120200100001.

It is a cyclic number.

It is not a de Polignac number, because 100001002021021 - 2⁷ = 100001002020893 is a prime.

It is a super-2 number, since 2×100001002021021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001002020989 and 100001002021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001002021321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2449980 + ... + 14352853.

It is an arithmetic number, because the mean of its divisors is an integer number (6436157535360).

Almost surely, 2^{100001002021021} is an apocalyptic number.

It is an amenable number.

100001002021021 is a deficient number, since it is larger than the sum of its proper divisors (2977518544739).

100001002021021 is a wasteful number, since it uses less digits than its factorization.

100001002021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16803636.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100001002021021 its reverse (120120200100001), we get a palindrome (220121202121022).

The spelling of 100001002021021 in words is "one hundred trillion, one billion, two million, twenty-one thousand, twenty-one".