1236208198801 has 9 divisors (see below), whose sum is σ = 1239871423849. Its totient is φ = 1232555774836.

The previous prime is 1236208198789. The next prime is 1236208198807. The reversal of 1236208198801 is 1088918026321.

It is a happy number.

The square root of 1236208198801 is 1111849.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1236208198801 - 2⁹ = 1236208198289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1236208198807) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 425836716 + ... + 425839618.

Almost surely, 2^{1236208198801} is an apocalyptic number.

1236208198801 is the 1111849-th square number.

1236208198801 is the 555925-th centered octagonal number.

It is an amenable number.

1236208198801 is a deficient number, since it is larger than the sum of its proper divisors (3663225048).

1236208198801 is an frugal number, since it uses more digits than its factorization.

1236208198801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572 (or 3286 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 49.

Multiplying 1236208198801 by its sum of digits (49), we get a square (60574201741249 = 7782943²).

The spelling of 1236208198801 in words is "one trillion, two hundred thirty-six billion, two hundred eight million, one hundred ninety-eight thousand, eight hundred one".