311440042041421 has 4 divisors (see below), whose sum is σ = 311623349896000. Its totient is φ = 311256734186844.

The previous prime is 311440042041389. The next prime is 311440042041431. The reversal of 311440042041421 is 124140240044113.

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 311440042041421 - 2⁵ = 311440042041389 is a prime.

It is a super-2 number, since 2×311440042041421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311440042041431) 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, 91653924741 + ... + 91653928138.

It is an arithmetic number, because the mean of its divisors is an integer number (77905837474000).

Almost surely, 2^{311440042041421} is an apocalyptic number.

It is an amenable number.

311440042041421 is a deficient number, since it is larger than the sum of its proper divisors (183307854579).

311440042041421 is a wasteful number, since it uses less digits than its factorization.

311440042041421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183307854578.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 311440042041421 its reverse (124140240044113), we get a palindrome (435580282085534).

The spelling of 311440042041421 in words is "three hundred eleven trillion, four hundred forty billion, forty-two million, forty-one thousand, four hundred twenty-one".