10100011001221 has 4 divisors (see below), whose sum is σ = 10425817807744. Its totient is φ = 9774204194700.

The previous prime is 10100011001219. The next prime is 10100011001279. The reversal of 10100011001221 is 12210011000101.

10100011001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10100011001221 - 2¹ = 10100011001219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10100011001198 and 10100011001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10100011008221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162903403215 + ... + 162903403276.

It is an arithmetic number, because the mean of its divisors is an integer number (2606454451936).

Almost surely, 2^{10100011001221} is an apocalyptic number.

It is an amenable number.

10100011001221 is a deficient number, since it is larger than the sum of its proper divisors (325806806523).

10100011001221 is an equidigital number, since it uses as much as digits as its factorization.

10100011001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325806806522.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10100011001221 its reverse (12210011000101), we get a palindrome (22310022001322).

The spelling of 10100011001221 in words is "ten trillion, one hundred billion, eleven million, one thousand, two hundred twenty-one".