1121011220129 has 2 divisors, whose sum is σ = 1121011220130. Its totient is φ = 1121011220128.

The previous prime is 1121011220101. The next prime is 1121011220149. The reversal of 1121011220129 is 9210221101211.

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., 731606515600 + 389404704529 = 855340^2 + 624023^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121011220129 - 2¹² = 1121011216033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121011220149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560505610064 + 560505610065.

It is an arithmetic number, because the mean of its divisors is an integer number (560505610065).

Almost surely, 2^{1121011220129} is an apocalyptic number.

It is an amenable number.

1121011220129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121011220129 is an equidigital number, since it uses as much as digits as its factorization.

1121011220129 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 23.

The spelling of 1121011220129 in words is "one trillion, one hundred twenty-one billion, eleven million, two hundred twenty thousand, one hundred twenty-nine".