1211363652401 has 64 divisors (see below), whose sum is σ = 1511217561600. Its totient is φ = 948514634496.

The previous prime is 1211363652397. The next prime is 1211363652419. The reversal of 1211363652401 is 1042563631121.

It is not a de Polignac number, because 1211363652401 - 2² = 1211363652397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211363655401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81406880 + ... + 81421758.

It is an arithmetic number, because the mean of its divisors is an integer number (23612774400).

Almost surely, 2^{1211363652401} is an apocalyptic number.

It is an amenable number.

1211363652401 is a deficient number, since it is larger than the sum of its proper divisors (299853909199).

1211363652401 is a wasteful number, since it uses less digits than its factorization.

1211363652401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15198.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 1211363652401 in words is "one trillion, two hundred eleven billion, three hundred sixty-three million, six hundred fifty-two thousand, four hundred one".