1211311214201 has 12 divisors (see below), whose sum is σ = 1331520441636. Its totient is φ = 1101126517920.

The previous prime is 1211311214167. The next prime is 1211311214231. The reversal of 1211311214201 is 1024121131121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 965021346025 + 246289868176 = 982355^2 + 496276^2 .

It is not a de Polignac number, because 1211311214201 - 2⁶ = 1211311214137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211311214231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1806311 + ... + 2384403.

It is an arithmetic number, because the mean of its divisors is an integer number (110960036803).

Almost surely, 2^{1211311214201} is an apocalyptic number.

1211311214201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211311214201 is a deficient number, since it is larger than the sum of its proper divisors (120209227435).

1211311214201 is a wasteful number, since it uses less digits than its factorization.

1211311214201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595432 (or 595421 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 1211311214201 its reverse (1024121131121), we get a palindrome (2235432345322).

The spelling of 1211311214201 in words is "one trillion, two hundred eleven billion, three hundred eleven million, two hundred fourteen thousand, two hundred one".