10121003221 has 4 divisors (see below), whose sum is σ = 11566860832. Its totient is φ = 8675145612.

The previous prime is 10121003213. The next prime is 10121003231. The reversal of 10121003221 is 12230012101.

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 not a de Polignac number, because 10121003221 - 2³ = 10121003213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121003231) 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, 722928795 + ... + 722928808.

It is an arithmetic number, because the mean of its divisors is an integer number (2891715208).

Almost surely, 2^10121003221 is an apocalyptic number.

It is an amenable number.

10121003221 is a deficient number, since it is larger than the sum of its proper divisors (1445857611).

10121003221 is an equidigital number, since it uses as much as digits as its factorization.

10121003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445857610.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10121003221 its reverse (12230012101), we get a palindrome (22351015322).

The spelling of 10121003221 in words is "ten billion, one hundred twenty-one million, three thousand, two hundred twenty-one".