21001000112211 has 8 divisors (see below), whose sum is σ = 32001523980544. Its totient is φ = 12000571492680.

The previous prime is 21001000112207. The next prime is 21001000112237. The reversal of 21001000112211 is 11221100010012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21001000112211 - 2² = 21001000112207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001000112611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500023812175 + ... + 500023812216.

It is an arithmetic number, because the mean of its divisors is an integer number (4000190497568).

Almost surely, 2^{21001000112211} is an apocalyptic number.

21001000112211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21001000112211 is a deficient number, since it is larger than the sum of its proper divisors (11000523868333).

21001000112211 is a wasteful number, since it uses less digits than its factorization.

21001000112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000047624401.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21001000112211 its reverse (11221100010012), we get a palindrome (32222100122223).

The spelling of 21001000112211 in words is "twenty-one trillion, one billion, one hundred twelve thousand, two hundred eleven".