10111220020191 has 4 divisors (see below), whose sum is σ = 13481626693592. Its totient is φ = 6740813346792.

The previous prime is 10111220020169. The next prime is 10111220020201. The reversal of 10111220020191 is 19102002211101.

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

It is not a de Polignac number, because 10111220020191 - 2⁵ = 10111220020159 is a prime.

It is a super-2 number, since 2×10111220020191² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111220220191) 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, 1685203336696 + ... + 1685203336701.

It is an arithmetic number, because the mean of its divisors is an integer number (3370406673398).

Almost surely, 2^{10111220020191} is an apocalyptic number.

10111220020191 is a deficient number, since it is larger than the sum of its proper divisors (3370406673401).

10111220020191 is an equidigital number, since it uses as much as digits as its factorization.

10111220020191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370406673400.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 10111220020191 its reverse (19102002211101), we get a palindrome (29213222231292).

The spelling of 10111220020191 in words is "ten trillion, one hundred eleven billion, two hundred twenty million, twenty thousand, one hundred ninety-one".