10121191 has 4 divisors (see below), whose sum is σ = 10198584. Its totient is φ = 10043800.

The previous prime is 10121183. The next prime is 10121233. The reversal of 10121191 is 19112101.

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 10121191 - 2³ = 10121183 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 (10121131) 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, 38500 + ... + 38761.

It is an arithmetic number, because the mean of its divisors is an integer number (2549646).

Almost surely, 2^10121191 is an apocalyptic number.

10121191 is a deficient number, since it is larger than the sum of its proper divisors (77393).

10121191 is an equidigital number, since it uses as much as digits as its factorization.

10121191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77392.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 10121191 is about 3181.3819324313. The cubic root of 10121191 is about 216.3103036071.

Adding to 10121191 its reverse (19112101), we get a palindrome (29233292).

The spelling of 10121191 in words is "ten million, one hundred twenty-one thousand, one hundred ninety-one".