21120011012211 has 8 divisors (see below), whose sum is σ = 29384363147520. Its totient is φ = 13467833109192.

The previous prime is 21120011012209. The next prime is 21120011012231. The reversal of 21120011012211 is 11221011002112.

It is a happy number.

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

It is not a de Polignac number, because 21120011012211 - 2¹ = 21120011012209 is a prime.

It is a super-2 number, since 2×21120011012211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21120011012231) by changing a digit.

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, 153043557991 + ... + 153043558128.

It is an arithmetic number, because the mean of its divisors is an integer number (3673045393440).

Almost surely, 2^{21120011012211} is an apocalyptic number.

21120011012211 is a deficient number, since it is larger than the sum of its proper divisors (8264352135309).

21120011012211 is a wasteful number, since it uses less digits than its factorization.

21120011012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306087116145.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21120011012211 its reverse (11221011002112), we get a palindrome (32341022014323).

The spelling of 21120011012211 in words is "twenty-one trillion, one hundred twenty billion, eleven million, twelve thousand, two hundred eleven".