10912940021 has 4 divisors (see below), whose sum is σ = 10920014112. Its totient is φ = 10905865932.

The previous prime is 10912939969. The next prime is 10912940063. The reversal of 10912940021 is 12004921901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12004921901 = 7 ⋅1714988843.

It is a cyclic number.

It is not a de Polignac number, because 10912940021 - 2⁶ = 10912939957 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 (10912940821) 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, 3534731 + ... + 3537816.

It is an arithmetic number, because the mean of its divisors is an integer number (2730003528).

Almost surely, 2^10912940021 is an apocalyptic number.

It is an amenable number.

10912940021 is a deficient number, since it is larger than the sum of its proper divisors (7074091).

10912940021 is an equidigital number, since it uses as much as digits as its factorization.

10912940021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074090.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 10912940021 in words is "ten billion, nine hundred twelve million, nine hundred forty thousand, twenty-one".