211021000211021 has 128 divisors (see below), whose sum is σ = 315815973580800. Its totient is φ = 135322749480960.

The previous prime is 211021000210949. The next prime is 211021000211027. The reversal of 211021000211021 is 120112000120112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211021000211021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211021000210987 and 211021000211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021000211027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4013382110 + ... + 4013434688.

It is an arithmetic number, because the mean of its divisors is an integer number (2467312293600).

Almost surely, 2^{211021000211021} is an apocalyptic number.

It is an amenable number.

211021000211021 is a deficient number, since it is larger than the sum of its proper divisors (104794973369779).

211021000211021 is a wasteful number, since it uses less digits than its factorization.

211021000211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65059.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211021000211021 its reverse (120112000120112), we get a palindrome (331133000331133).

Subtracting from 211021000211021 its reverse (120112000120112), we obtain a palindrome (90909000090909).

The spelling of 211021000211021 in words is "two hundred eleven trillion, twenty-one billion, two hundred eleven thousand, twenty-one".