21050323011 has 40 divisors (see below), whose sum is σ = 32179270464. Its totient is φ = 13707308160.

The previous prime is 21050322973. The next prime is 21050323039. The reversal of 21050323011 is 11032305012.

It is not a de Polignac number, because 21050323011 - 2¹⁰ = 21050321987 is a prime.

It is a super-2 number, since 2×21050323011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21050323211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1978141 + ... + 1988753.

Almost surely, 2^21050323011 is an apocalyptic number.

21050323011 is a deficient number, since it is larger than the sum of its proper divisors (11128947453).

21050323011 is a wasteful number, since it uses less digits than its factorization.

21050323011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193 (or 11184 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 21050323011 its reverse (11032305012), we get a palindrome (32082628023).

The spelling of 21050323011 in words is "twenty-one billion, fifty million, three hundred twenty-three thousand, eleven".