1211404652231 has 2 divisors, whose sum is σ = 1211404652232. Its totient is φ = 1211404652230.

The previous prime is 1211404652173. The next prime is 1211404652239. The reversal of 1211404652231 is 1322564041121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211404652231 - 2¹⁰ = 1211404651207 is a prime.

It is a super-3 number, since 3×1211404652231³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211404652239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605702326115 + 605702326116.

It is an arithmetic number, because the mean of its divisors is an integer number (605702326116).

Almost surely, 2^{1211404652231} is an apocalyptic number.

1211404652231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211404652231 is an equidigital number, since it uses as much as digits as its factorization.

1211404652231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 1211404652231 its reverse (1322564041121), we get a palindrome (2533968693352).

The spelling of 1211404652231 in words is "one trillion, two hundred eleven billion, four hundred four million, six hundred fifty-two thousand, two hundred thirty-one".