1211122002005 has 16 divisors (see below), whose sum is σ = 1467006085440. Its totient is φ = 959792097792.

The previous prime is 1211122001899. The next prime is 1211122002007. The reversal of 1211122002005 is 5002002211121.

It is a cyclic number.

It is not a de Polignac number, because 1211122002005 - 2¹⁰ = 1211122000981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211122002007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12699941 + ... + 12794949.

It is an arithmetic number, because the mean of its divisors is an integer number (91687880340).

Almost surely, 2^{1211122002005} is an apocalyptic number.

It is an amenable number.

1211122002005 is a deficient number, since it is larger than the sum of its proper divisors (255884083435).

1211122002005 is a wasteful number, since it uses less digits than its factorization.

1211122002005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118948.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 1211122002005 its reverse (5002002211121), we get a palindrome (6213124213126).

The spelling of 1211122002005 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, two thousand, five".