1201221029 has 2 divisors, whose sum is σ = 1201221030. Its totient is φ = 1201221028.

The previous prime is 1201221019. The next prime is 1201221031. The reversal of 1201221029 is 9201221021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1200969025 + 252004 = 34655^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201221029 - 2⁸ = 1201220773 is a prime.

Together with 1201221031, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201221029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201221019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600610514 + 600610515.

It is an arithmetic number, because the mean of its divisors is an integer number (600610515).

Almost surely, 2^1201221029 is an apocalyptic number.

It is an amenable number.

1201221029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201221029 is an equidigital number, since it uses as much as digits as its factorization.

1201221029 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 1201221029 is about 34658.6357059824. The cubic root of 1201221029 is about 1063.0188739290.

The spelling of 1201221029 in words is "one billion, two hundred one million, two hundred twenty-one thousand, twenty-nine".