1021271316 has 96 divisors (see below), whose sum is σ = 2663743488. Its totient is φ = 302417280.

The previous prime is 1021271291. The next prime is 1021271393. The reversal of 1021271316 is 6131721201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1077955 + ... + 1078901.

It is an arithmetic number, because the mean of its divisors is an integer number (27747328).

Almost surely, 2^1021271316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021271316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1331871744).

1021271316 is an abundant number, since it is smaller than the sum of its proper divisors (1642472172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021271316 is a wasteful number, since it uses less digits than its factorization.

1021271316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1021271316 is about 31957.3358714396. The cubic root of 1021271316 is about 1007.0407501621.

Adding to 1021271316 its reverse (6131721201), we get a palindrome (7152992517).

The spelling of 1021271316 in words is "one billion, twenty-one million, two hundred seventy-one thousand, three hundred sixteen".