1211342201 has 4 divisors (see below), whose sum is σ = 1215237504. Its totient is φ = 1207446900.

The previous prime is 1211342177. The next prime is 1211342203. The reversal of 1211342201 is 1022431121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1022431121 = 23 ⋅44453527.

It is a cyclic number.

It is not a de Polignac number, because 1211342201 - 2³⁰ = 137600377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211342201.

It is not an unprimeable number, because it can be changed into a prime (1211342203) 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, 1947185 + ... + 1947806.

It is an arithmetic number, because the mean of its divisors is an integer number (303809376).

Almost surely, 2^1211342201 is an apocalyptic number.

It is an amenable number.

1211342201 is a deficient number, since it is larger than the sum of its proper divisors (3895303).

1211342201 is an equidigital number, since it uses as much as digits as its factorization.

1211342201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895302.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1211342201 is about 34804.3416975526. The cubic root of 1211342201 is about 1065.9961000929.

Adding to 1211342201 its reverse (1022431121), we get a palindrome (2233773322).

The spelling of 1211342201 in words is "one billion, two hundred eleven million, three hundred forty-two thousand, two hundred one".