1321229153 has 2 divisors, whose sum is σ = 1321229154. Its totient is φ = 1321229152.

The previous prime is 1321229099. The next prime is 1321229167. The reversal of 1321229153 is 3519221231.

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., 1219965184 + 101263969 = 34928^2 + 10063^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321229153 - 2²⁴ = 1304451937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321279153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660614576 + 660614577.

It is an arithmetic number, because the mean of its divisors is an integer number (660614577).

Almost surely, 2^1321229153 is an apocalyptic number.

It is an amenable number.

1321229153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321229153 is an equidigital number, since it uses as much as digits as its factorization.

1321229153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 1321229153 is about 36348.7159745705. The cubic root of 1321229153 is about 1097.3016930597.

The spelling of 1321229153 in words is "one billion, three hundred twenty-one million, two hundred twenty-nine thousand, one hundred fifty-three".