21000000411206 has 16 divisors (see below), whose sum is σ = 32586631795440. Its totient is φ = 10137799240800.

The previous prime is 21000000411199. The next prime is 21000000411259. The reversal of 21000000411206 is 60211400000012.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2211905 + ... + 6847811.

It is an arithmetic number, because the mean of its divisors is an integer number (2036664487215).

Almost surely, 2^{21000000411206} is an apocalyptic number.

21000000411206 is a deficient number, since it is larger than the sum of its proper divisors (11586631384234).

21000000411206 is a wasteful number, since it uses less digits than its factorization.

21000000411206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714039.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21000000411206 its reverse (60211400000012), we get a palindrome (81211400411218).

The spelling of 21000000411206 in words is "twenty-one trillion, four hundred eleven thousand, two hundred six".