1121012001689 has 2 divisors, whose sum is σ = 1121012001690. Its totient is φ = 1121012001688.

The previous prime is 1121012001643. The next prime is 1121012001713. The reversal of 1121012001689 is 9861002101211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1114449705625 + 6562296064 = 1055675^2 + 81008^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121012001689 - 2⁸ = 1121012001433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121612001689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560506000844 + 560506000845.

It is an arithmetic number, because the mean of its divisors is an integer number (560506000845).

Almost surely, 2^{1121012001689} is an apocalyptic number.

It is an amenable number.

1121012001689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121012001689 is an equidigital number, since it uses as much as digits as its factorization.

1121012001689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 32.

The spelling of 1121012001689 in words is "one trillion, one hundred twenty-one billion, twelve million, one thousand, six hundred eighty-nine".