12121220029 has 2 divisors, whose sum is σ = 12121220030. Its totient is φ = 12121220028.

The previous prime is 12121220021. The next prime is 12121220063. The reversal of 12121220029 is 92002212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11683448100 + 437771929 = 108090^2 + 20923^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121220029 - 2³ = 12121220021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121219991 and 12121220009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121220021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060610014 + 6060610015.

It is an arithmetic number, because the mean of its divisors is an integer number (6060610015).

Almost surely, 2^12121220029 is an apocalyptic number.

It is an amenable number.

12121220029 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121220029 is an equidigital number, since it uses as much as digits as its factorization.

12121220029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 12121220029 in words is "twelve billion, one hundred twenty-one million, two hundred twenty thousand, twenty-nine".