311120140421 has 16 divisors (see below), whose sum is σ = 330514905600. Its totient is φ = 292225523568.

The previous prime is 311120140333. The next prime is 311120140423. The reversal of 311120140421 is 124041021113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311120140421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 311120140393 and 311120140402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311120140423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1104410 + ... + 1357188.

It is an arithmetic number, because the mean of its divisors is an integer number (20657181600).

Almost surely, 2^311120140421 is an apocalyptic number.

It is an amenable number.

311120140421 is a deficient number, since it is larger than the sum of its proper divisors (19394765179).

311120140421 is a wasteful number, since it uses less digits than its factorization.

311120140421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253768.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 311120140421 its reverse (124041021113), we get a palindrome (435161161534).

The spelling of 311120140421 in words is "three hundred eleven billion, one hundred twenty million, one hundred forty thousand, four hundred twenty-one".