10012201921 has 4 divisors (see below), whose sum is σ = 10447515072. Its totient is φ = 9576888772.

The previous prime is 10012201909. The next prime is 10012201933. The reversal of 10012201921 is 12910221001.

It is a happy number.

10012201921 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 12910221001 = 79 ⋅163420519.

It is an interprime number because it is at equal distance from previous prime (10012201909) and next prime (10012201933).

It is a cyclic number.

It is not a de Polignac number, because 10012201921 - 2²⁵ = 9978647489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10012201021) 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, 217656541 + ... + 217656586.

It is an arithmetic number, because the mean of its divisors is an integer number (2611878768).

Almost surely, 2^10012201921 is an apocalyptic number.

It is an amenable number.

10012201921 is a deficient number, since it is larger than the sum of its proper divisors (435313151).

10012201921 is an equidigital number, since it uses as much as digits as its factorization.

10012201921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435313150.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 10012201921 its reverse (12910221001), we get a palindrome (22922422922).

The spelling of 10012201921 in words is "ten billion, twelve million, two hundred one thousand, nine hundred twenty-one".