1011315021 has 8 divisors (see below), whose sum is σ = 1351818144. Its totient is φ = 672510960.

The previous prime is 1011315017. The next prime is 1011315031. The reversal of 1011315021 is 1205131101.

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

It is not a de Polignac number, because 1011315021 - 2² = 1011315017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011315031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423375 + ... + 425756.

It is an arithmetic number, because the mean of its divisors is an integer number (168977268).

Almost surely, 2^1011315021 is an apocalyptic number.

It is an amenable number.

1011315021 is a deficient number, since it is larger than the sum of its proper divisors (340503123).

1011315021 is an equidigital number, since it uses as much as digits as its factorization.

1011315021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849531.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 1011315021 is about 31801.1795535952. The cubic root of 1011315021 is about 1003.7575368988.

Adding to 1011315021 its reverse (1205131101), we get a palindrome (2216446122).

The spelling of 1011315021 in words is "one billion, eleven million, three hundred fifteen thousand, twenty-one".