10100203121221 has 16 divisors (see below), whose sum is σ = 11072221200000. Its totient is φ = 9176656781376.

The previous prime is 10100203121207. The next prime is 10100203121233. The reversal of 10100203121221 is 12212130200101.

It is a cyclic number.

It is not a de Polignac number, because 10100203121221 - 2⁵ = 10100203121189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10100203121195 and 10100203121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100203121321) 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, 61430241 + ... + 61594438.

It is an arithmetic number, because the mean of its divisors is an integer number (692013825000).

Almost surely, 2^{10100203121221} is an apocalyptic number.

It is an amenable number.

10100203121221 is a deficient number, since it is larger than the sum of its proper divisors (972018078779).

10100203121221 is a wasteful number, since it uses less digits than its factorization.

10100203121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123024876.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 10100203121221 its reverse (12212130200101), we get a palindrome (22312333321322).

The spelling of 10100203121221 in words is "ten trillion, one hundred billion, two hundred three million, one hundred twenty-one thousand, two hundred twenty-one".