10012220191 has 4 divisors (see below), whose sum is σ = 10064640384. Its totient is φ = 9959800000.

The previous prime is 10012220093. The next prime is 10012220201. The reversal of 10012220191 is 19102221001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10012220191 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 (10012220591) 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, 26209810 + ... + 26210191.

It is an arithmetic number, because the mean of its divisors is an integer number (2516160096).

Almost surely, 2^10012220191 is an apocalyptic number.

10012220191 is a deficient number, since it is larger than the sum of its proper divisors (52420193).

10012220191 is an equidigital number, since it uses as much as digits as its factorization.

10012220191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52420192.

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

Adding to 10012220191 its reverse (19102221001), we get a palindrome (29114441192).

The spelling of 10012220191 in words is "ten billion, twelve million, two hundred twenty thousand, one hundred ninety-one".