311442421021 has 8 divisors (see below), whose sum is σ = 344100066624. Its totient is φ = 280377831360.

The previous prime is 311442421019. The next prime is 311442421057. The reversal of 311442421021 is 120124244113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311442421021 - 2¹ = 311442421019 is a prime.

It is a super-2 number, since 2×311442421021² (a number of 24 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 (311442421421) 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 7 ways as a sum of consecutive naturals, for example, 398263575 + ... + 398264356.

It is an arithmetic number, because the mean of its divisors is an integer number (43012508328).

Almost surely, 2^311442421021 is an apocalyptic number.

It is an amenable number.

311442421021 is a deficient number, since it is larger than the sum of its proper divisors (32657645603).

311442421021 is a wasteful number, since it uses less digits than its factorization.

311442421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796527971.

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

Adding to 311442421021 its reverse (120124244113), we get a palindrome (431566665134).

The spelling of 311442421021 in words is "three hundred eleven billion, four hundred forty-two million, four hundred twenty-one thousand, twenty-one".