1211202101201 has 4 divisors (see below), whose sum is σ = 1211552466852. Its totient is φ = 1210851735552.

The previous prime is 1211202101177. The next prime is 1211202101237. The reversal of 1211202101201 is 1021012021121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68355579601 + 1142846521600 = 261449^2 + 1069040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211202101201 - 2¹⁴ = 1211202084817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211202101281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175177640 + ... + 175184553.

It is an arithmetic number, because the mean of its divisors is an integer number (302888116713).

Almost surely, 2^{1211202101201} is an apocalyptic number.

It is an amenable number.

1211202101201 is a deficient number, since it is larger than the sum of its proper divisors (350365651).

1211202101201 is an equidigital number, since it uses as much as digits as its factorization.

1211202101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350365650.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211202101201 its reverse (1021012021121), we get a palindrome (2232214122322).

The spelling of 1211202101201 in words is "one trillion, two hundred eleven billion, two hundred two million, one hundred one thousand, two hundred one".