21012535311411 has 32 divisors (see below), whose sum is σ = 32177644830720. Its totient is φ = 11947853754144.

The previous prime is 21012535311401. The next prime is 21012535311421. The reversal of 21012535311411 is 11411353521012.

It is an interprime number because it is at equal distance from previous prime (21012535311401) and next prime (21012535311421).

It is not a de Polignac number, because 21012535311411 - 2⁶ = 21012535311347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012535311401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480646 + ... + 6500468.

It is an arithmetic number, because the mean of its divisors is an integer number (1005551400960).

Almost surely, 2^{21012535311411} is an apocalyptic number.

21012535311411 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21012535311411 is a deficient number, since it is larger than the sum of its proper divisors (11165109519309).

21012535311411 is a wasteful number, since it uses less digits than its factorization.

21012535311411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020655.

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 21012535311411 its reverse (11411353521012), we get a palindrome (32423888832423).

The spelling of 21012535311411 in words is "twenty-one trillion, twelve billion, five hundred thirty-five million, three hundred eleven thousand, four hundred eleven".