311400213421 has 24 divisors (see below), whose sum is σ = 366984312480. Its totient is φ = 261922617600.

The previous prime is 311400213409. The next prime is 311400213427. The reversal of 311400213421 is 124312004113.

It is not a de Polignac number, because 311400213421 - 2⁹ = 311400212909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311400213392 and 311400213401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311400213427) 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 23 ways as a sum of consecutive naturals, for example, 642570 + ... + 1017691.

It is an arithmetic number, because the mean of its divisors is an integer number (15291013020).

Almost surely, 2^311400213421 is an apocalyptic number.

It is an amenable number.

311400213421 is a deficient number, since it is larger than the sum of its proper divisors (55584099059).

311400213421 is a wasteful number, since it uses less digits than its factorization.

311400213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660365 (or 1660348 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 311400213421 its reverse (124312004113), we get a palindrome (435712217534).

The spelling of 311400213421 in words is "three hundred eleven billion, four hundred million, two hundred thirteen thousand, four hundred twenty-one".