21120001212211 has 32 divisors (see below), whose sum is σ = 25679956953600. Its totient is φ = 17119039956480.

The previous prime is 21120001212203. The next prime is 21120001212253. The reversal of 21120001212211 is 11221210002112.

It is not a de Polignac number, because 21120001212211 - 2³ = 21120001212203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120001212281) 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, 200759421 + ... + 200864593.

It is an arithmetic number, because the mean of its divisors is an integer number (802498654800).

Almost surely, 2^{21120001212211} is an apocalyptic number.

21120001212211 is a deficient number, since it is larger than the sum of its proper divisors (4559955741389).

21120001212211 is a wasteful number, since it uses less digits than its factorization.

21120001212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161739.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21120001212211 its reverse (11221210002112), we get a palindrome (32341211214323).

The spelling of 21120001212211 in words is "twenty-one trillion, one hundred twenty billion, one million, two hundred twelve thousand, two hundred eleven".