1210011121205 has 16 divisors (see below), whose sum is σ = 1462967101440. Its totient is φ = 960709825152.

The previous prime is 1210011121201. The next prime is 1210011121217. The reversal of 1210011121205 is 5021211100121.

It is a cyclic number.

It is not a de Polignac number, because 1210011121205 - 2² = 1210011121201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210011121201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2636552 + ... + 3061278.

It is an arithmetic number, because the mean of its divisors is an integer number (91435443840).

Almost surely, 2^{1210011121205} is an apocalyptic number.

It is an amenable number.

1210011121205 is a deficient number, since it is larger than the sum of its proper divisors (252955980235).

1210011121205 is a wasteful number, since it uses less digits than its factorization.

1210011121205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429028.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 1210011121205 its reverse (5021211100121), we get a palindrome (6231222221326).

The spelling of 1210011121205 in words is "one trillion, two hundred ten billion, eleven million, one hundred twenty-one thousand, two hundred five".