21010140511 has 8 divisors (see below), whose sum is σ = 22311655920. Its totient is φ = 19728196992.

The previous prime is 21010140499. The next prime is 21010140551. The reversal of 21010140511 is 11504101012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010140511 is a prime.

It is a super-2 number, since 2×21010140511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010140551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4890760 + ... + 4895053.

It is an arithmetic number, because the mean of its divisors is an integer number (2788956990).

Almost surely, 2^21010140511 is an apocalyptic number.

21010140511 is a deficient number, since it is larger than the sum of its proper divisors (1301515409).

21010140511 is a wasteful number, since it uses less digits than its factorization.

21010140511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9785945.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 21010140511 its reverse (11504101012), we get a palindrome (32514241523).

The spelling of 21010140511 in words is "twenty-one billion, ten million, one hundred forty thousand, five hundred eleven".