10521310905 has 48 divisors (see below), whose sum is σ = 20861967360. Its totient is φ = 4805184384.

The previous prime is 10521310901. The next prime is 10521310939. The reversal of 10521310905 is 50901312501.

It is not a de Polignac number, because 10521310905 - 2² = 10521310901 is a prime.

It is a super-2 number, since 2×10521310905² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10521310901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 329016 + ... + 359574.

It is an arithmetic number, because the mean of its divisors is an integer number (434624320).

Almost surely, 2^10521310905 is an apocalyptic number.

10521310905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10521310905 is a deficient number, since it is larger than the sum of its proper divisors (10340656455).

10521310905 is a wasteful number, since it uses less digits than its factorization.

10521310905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31670 (or 31667 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The spelling of 10521310905 in words is "ten billion, five hundred twenty-one million, three hundred ten thousand, nine hundred five".