21023211411 has 18 divisors (see below), whose sum is σ = 31209786972. Its totient is φ = 13636669680.

The previous prime is 21023211401. The next prime is 21023211427. The reversal of 21023211411 is 11411232012.

21023211411 is a `hidden beast` number, since 2 + 10 + 232 + 11 + 411 = 666.

It is not a de Polignac number, because 21023211411 - 2⁹ = 21023210899 is a prime.

It is a super-2 number, since 2×21023211411² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21023211401) 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 17 ways as a sum of consecutive naturals, for example, 840825 + ... + 865466.

It is an arithmetic number, because the mean of its divisors is an integer number (1733877054).

Almost surely, 2^21023211411 is an apocalyptic number.

21023211411 is a deficient number, since it is larger than the sum of its proper divisors (10186575561).

21023211411 is a wasteful number, since it uses less digits than its factorization.

21023211411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706371 (or 1706331 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21023211411 its reverse (11411232012), we get a palindrome (32434443423).

The spelling of 21023211411 in words is "twenty-one billion, twenty-three million, two hundred eleven thousand, four hundred eleven".