1311211202001 has 16 divisors (see below), whose sum is σ = 1749036986496. Its totient is φ = 873763210496.

The previous prime is 1311211201987. The next prime is 1311211202009. The reversal of 1311211202001 is 1002021121131.

It is a cyclic number.

It is not a de Polignac number, because 1311211202001 - 2⁷ = 1311211201873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1311211202009) 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, 93430681 + ... + 93444713.

It is an arithmetic number, because the mean of its divisors is an integer number (109314811656).

Almost surely, 2^{1311211202001} is an apocalyptic number.

It is an amenable number.

1311211202001 is a deficient number, since it is larger than the sum of its proper divisors (437825784495).

1311211202001 is a wasteful number, since it uses less digits than its factorization.

1311211202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25272.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1311211202001 its reverse (1002021121131), we get a palindrome (2313232323132).

The spelling of 1311211202001 in words is "one trillion, three hundred eleven billion, two hundred eleven million, two hundred two thousand, one".