1021315801 has 16 divisors (see below), whose sum is σ = 1152926208. Its totient is φ = 896313600.

The previous prime is 1021315753. The next prime is 1021315807. The reversal of 1021315801 is 1085131201.

It is a cyclic number.

It is not a de Polignac number, because 1021315801 - 2¹¹ = 1021313753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021315807) 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, 144195 + ... + 151111.

It is an arithmetic number, because the mean of its divisors is an integer number (72057888).

Almost surely, 2^1021315801 is an apocalyptic number.

1021315801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021315801 is a deficient number, since it is larger than the sum of its proper divisors (131610407).

1021315801 is a wasteful number, since it uses less digits than its factorization.

1021315801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7392.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1021315801 is about 31958.0318699384. The cubic root of 1021315801 is about 1007.0553716626.

The spelling of 1021315801 in words is "one billion, twenty-one million, three hundred fifteen thousand, eight hundred one".