12021213929 has 2 divisors, whose sum is σ = 12021213930. Its totient is φ = 12021213928.

The previous prime is 12021213917. The next prime is 12021213943. The reversal of 12021213929 is 92931212021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11870538304 + 150675625 = 108952^2 + 12275^2 .

It is an emirp because it is prime and its reverse (92931212021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12021213929 - 2⁴ = 12021213913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021213895 and 12021213904.

It is not a weakly prime, because it can be changed into another prime (12021213959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010606964 + 6010606965.

It is an arithmetic number, because the mean of its divisors is an integer number (6010606965).

Almost surely, 2^12021213929 is an apocalyptic number.

It is an amenable number.

12021213929 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021213929 is an equidigital number, since it uses as much as digits as its factorization.

12021213929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 12021213929 in words is "twelve billion, twenty-one million, two hundred thirteen thousand, nine hundred twenty-nine".