10212091 has 4 divisors (see below), whose sum is σ = 10219912. Its totient is φ = 10204272.

The previous prime is 10212077. The next prime is 10212119. The reversal of 10212091 is 19021201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19021201 = 421 ⋅45181.

It is a cyclic number.

It is not a de Polignac number, because 10212091 - 2²³ = 1823483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212011) 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, 1425 + ... + 4738.

It is an arithmetic number, because the mean of its divisors is an integer number (2554978).

Almost surely, 2^10212091 is an apocalyptic number.

10212091 is a deficient number, since it is larger than the sum of its proper divisors (7821).

10212091 is an equidigital number, since it uses as much as digits as its factorization.

10212091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7820.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 10212091 is about 3195.6362433794. The cubic root of 10212091 is about 216.9559468007.

Adding to 10212091 its reverse (19021201), we get a palindrome (29233292).

The spelling of 10212091 in words is "ten million, two hundred twelve thousand, ninety-one".