12149021 has 2 divisors, whose sum is σ = 12149022. Its totient is φ = 12149020.

The previous prime is 12149009. The next prime is 12149041. The reversal of 12149021 is 12094121.

12149021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12149041) can be obtained adding 12149021 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9211225 + 2937796 = 3035^2 + 1714^2 .

It is a cyclic number.

It is not a de Polignac number, because 12149021 - 2⁶ = 12148957 is a prime.

It is a super-2 number, since 2×12149021² = 295197422516882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12148984 and 12149002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12149041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074510 + 6074511.

It is an arithmetic number, because the mean of its divisors is an integer number (6074511).

Almost surely, 2^12149021 is an apocalyptic number.

It is an amenable number.

12149021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12149021 is an equidigital number, since it uses as much as digits as its factorization.

12149021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 12149021 is about 3485.5445772504. The cubic root of 12149021 is about 229.8866549272.

The spelling of 12149021 in words is "twelve million, one hundred forty-nine thousand, twenty-one".