10191020219 has 4 divisors (see below), whose sum is σ = 10220221200. Its totient is φ = 10161819240.

The previous prime is 10191020201. The next prime is 10191020261. The reversal of 10191020219 is 91202019101.

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

It is a cyclic number.

It is not a de Polignac number, because 10191020219 - 2⁸ = 10191019963 is a prime.

It is a super-2 number, since 2×10191020219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10191020269) 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, 14599967 + ... + 14600664.

It is an arithmetic number, because the mean of its divisors is an integer number (2555055300).

Almost surely, 2^10191020219 is an apocalyptic number.

10191020219 is a deficient number, since it is larger than the sum of its proper divisors (29200981).

10191020219 is an equidigital number, since it uses as much as digits as its factorization.

10191020219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29200980.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 10191020219 in words is "ten billion, one hundred ninety-one million, twenty thousand, two hundred nineteen".