21000210220311 has 32 divisors (see below), whose sum is σ = 32520391354368. Its totient is φ = 11805921642240.

The previous prime is 21000210220277. The next prime is 21000210220331. The reversal of 21000210220311 is 11302201200012.

It is not a de Polignac number, because 21000210220311 - 2⁹ = 21000210219799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000210220331) 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, 16644255 + ... + 17861456.

It is an arithmetic number, because the mean of its divisors is an integer number (1016262229824).

Almost surely, 2^{21000210220311} is an apocalyptic number.

21000210220311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21000210220311 is a deficient number, since it is larger than the sum of its proper divisors (11520181134057).

21000210220311 is a wasteful number, since it uses less digits than its factorization.

21000210220311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34506191.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21000210220311 its reverse (11302201200012), we get a palindrome (32302411420323).

The spelling of 21000210220311 in words is "twenty-one trillion, two hundred ten million, two hundred twenty thousand, three hundred eleven".