1211401324421 has 4 divisors (see below), whose sum is σ = 1223162502432. Its totient is φ = 1199640146412.

The previous prime is 1211401324411. The next prime is 1211401324451. The reversal of 1211401324421 is 1244231041121.

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.

It is a cyclic number.

It is not a de Polignac number, because 1211401324421 - 2¹⁴ = 1211401308037 is a prime.

It is a super-3 number, since 3×1211401324421³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211401324411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5880588851 + ... + 5880589056.

It is an arithmetic number, because the mean of its divisors is an integer number (305790625608).

Almost surely, 2^{1211401324421} is an apocalyptic number.

It is an amenable number.

1211401324421 is a deficient number, since it is larger than the sum of its proper divisors (11761178011).

1211401324421 is a wasteful number, since it uses less digits than its factorization.

1211401324421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11761178010.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 1211401324421 its reverse (1244231041121), we get a palindrome (2455632365542).

The spelling of 1211401324421 in words is "one trillion, two hundred eleven billion, four hundred one million, three hundred twenty-four thousand, four hundred twenty-one".