21112012100211 has 16 divisors (see below), whose sum is σ = 28920417168384. Its totient is φ = 13692727244864.

The previous prime is 21112012100197. The next prime is 21112012100213. The reversal of 21112012100211 is 11200121021112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21112012100211 - 2⁶ = 21112012100147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112012100213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448271610 + ... + 448318703.

It is an arithmetic number, because the mean of its divisors is an integer number (1807526073024).

Almost surely, 2^{21112012100211} is an apocalyptic number.

21112012100211 is a deficient number, since it is larger than the sum of its proper divisors (7808405068173).

21112012100211 is a wasteful number, since it uses less digits than its factorization.

21112012100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896590530.

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

Adding to 21112012100211 its reverse (11200121021112), we get a palindrome (32312133121323).

The spelling of 21112012100211 in words is "twenty-one trillion, one hundred twelve billion, twelve million, one hundred thousand, two hundred eleven".