1011226129 has 2 divisors, whose sum is σ = 1011226130. Its totient is φ = 1011226128.

The previous prime is 1011226123. The next prime is 1011226133. The reversal of 1011226129 is 9216221101.

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., 847974400 + 163251729 = 29120^2 + 12777^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011226129 - 2³ = 1011226121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011226121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505613064 + 505613065.

It is an arithmetic number, because the mean of its divisors is an integer number (505613065).

Almost surely, 2^1011226129 is an apocalyptic number.

It is an amenable number.

1011226129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011226129 is an equidigital number, since it uses as much as digits as its factorization.

1011226129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1011226129 is about 31799.7819017678. The cubic root of 1011226129 is about 1003.7281267983.

The spelling of 1011226129 in words is "one billion, eleven million, two hundred twenty-six thousand, one hundred twenty-nine".