21010531113 has 192 divisors, whose sum is σ = 39391672320. Its totient is φ = 11093163840.

The previous prime is 21010531111. The next prime is 21010531121. The reversal of 21010531113 is 31113501012.

21010531113 is a `hidden beast` number, since 2 + 10 + 10 + 531 + 113 = 666.

It is not a de Polignac number, because 21010531113 - 2¹ = 21010531111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010531111) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 79887820 + ... + 79888082.

It is an arithmetic number, because the mean of its divisors is an integer number (205164960).

Almost surely, 2^21010531113 is an apocalyptic number.

It is an amenable number.

21010531113 is a deficient number, since it is larger than the sum of its proper divisors (18381141207).

21010531113 is a wasteful number, since it uses less digits than its factorization.

21010531113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The spelling of 21010531113 in words is "twenty-one billion, ten million, five hundred thirty-one thousand, one hundred thirteen".