1211011201201 has 4 divisors (see below), whose sum is σ = 1227600395812. Its totient is φ = 1194422006592.

The previous prime is 1211011201129. The next prime is 1211011201207. The reversal of 1211011201201 is 1021021101121.

It is a happy number.

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 235854951201 + 975156250000 = 485649^2 + 987500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211011201201 - 2²⁷ = 1210876983473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211011201207) 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, 8294597196 + ... + 8294597341.

It is an arithmetic number, because the mean of its divisors is an integer number (306900098953).

Almost surely, 2^{1211011201201} is an apocalyptic number.

It is an amenable number.

1211011201201 is a deficient number, since it is larger than the sum of its proper divisors (16589194611).

1211011201201 is an equidigital number, since it uses as much as digits as its factorization.

1211011201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16589194610.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211011201201 its reverse (1021021101121), we get a palindrome (2232032302322).

The spelling of 1211011201201 in words is "one trillion, two hundred eleven billion, eleven million, two hundred one thousand, two hundred one".