312021116 has 24 divisors (see below), whose sum is σ = 627029760. Its totient is φ = 134362800.

The previous prime is 312021091. The next prime is 312021131. The reversal of 312021116 is 611120213.

It is a junction number, because it is equal to n+sod(n) for n = 312021094 and 312021103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185780 + ... + 187451.

It is an arithmetic number, because the mean of its divisors is an integer number (26126240).

Almost surely, 2^312021116 is an apocalyptic number.

It is an amenable number.

312021116 is an abundant number, since it is smaller than the sum of its proper divisors (315008644).

312021116 is a wasteful number, since it uses less digits than its factorization.

312021116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373265 (or 373263 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 312021116 is about 17664.1194515889. The cubic root of 312021116 is about 678.2575892877.

Adding to 312021116 its reverse (611120213), we get a palindrome (923141329).

The spelling of 312021116 in words is "three hundred twelve million, twenty-one thousand, one hundred sixteen".