21112012201211 has 8 divisors (see below), whose sum is σ = 21139660115184. Its totient is φ = 21084368991840.

The previous prime is 21112012201183. The next prime is 21112012201253. The reversal of 21112012201211 is 11210221021112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112012201211 is a prime.

It is a super-3 number, since 3×21112012201211³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112012201211.

It is not an unprimeable number, because it can be changed into a prime (21112012201411) 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, 7850081 + ... + 10190573.

It is an arithmetic number, because the mean of its divisors is an integer number (2642457514398).

Almost surely, 2^{21112012201211} is an apocalyptic number.

21112012201211 is a deficient number, since it is larger than the sum of its proper divisors (27647913973).

21112012201211 is a wasteful number, since it uses less digits than its factorization.

21112012201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352301.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112012201211 its reverse (11210221021112), we get a palindrome (32322233222323).

The spelling of 21112012201211 in words is "twenty-one trillion, one hundred twelve billion, twelve million, two hundred one thousand, two hundred eleven".