311242401421 has 4 divisors (see below), whose sum is σ = 355705601632. Its totient is φ = 266779201212.

The previous prime is 311242401359. The next prime is 311242401497. The reversal of 311242401421 is 124104242113.

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: 124104242113 = 65629 ⋅1890997.

It is a cyclic number.

It is not a de Polignac number, because 311242401421 - 2¹¹ = 311242399373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311242401721) 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, 22231600095 + ... + 22231600108.

It is an arithmetic number, because the mean of its divisors is an integer number (88926400408).

Almost surely, 2^311242401421 is an apocalyptic number.

It is an amenable number.

311242401421 is a deficient number, since it is larger than the sum of its proper divisors (44463200211).

311242401421 is an equidigital number, since it uses as much as digits as its factorization.

311242401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44463200210.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 311242401421 its reverse (124104242113), we get a palindrome (435346643534).

The spelling of 311242401421 in words is "three hundred eleven billion, two hundred forty-two million, four hundred one thousand, four hundred twenty-one".