1142121229 has 2 divisors, whose sum is σ = 1142121230. Its totient is φ = 1142121228.

The previous prime is 1142121209. The next prime is 1142121283. The reversal of 1142121229 is 9221212411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917181225 + 224940004 = 30285^2 + 14998^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142121229 - 2²¹ = 1140024077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142121209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571060614 + 571060615.

It is an arithmetic number, because the mean of its divisors is an integer number (571060615).

Almost surely, 2^1142121229 is an apocalyptic number.

It is an amenable number.

1142121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142121229 is an equidigital number, since it uses as much as digits as its factorization.

1142121229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

The square root of 1142121229 is about 33795.2841236762. The cubic root of 1142121229 is about 1045.2914578159.

The spelling of 1142121229 in words is "one billion, one hundred forty-two million, one hundred twenty-one thousand, two hundred twenty-nine".