212121112102011 has 24 divisors (see below), whose sum is σ = 350236859481600. Its totient is φ = 121188292142256.

The previous prime is 212121112102007. The next prime is 212121112102117. The reversal of 212121112102011 is 110201211121212.

It is a happy number.

212121112102011 is a `hidden beast` number, since 21 + 21 + 211 + 1 + 210 + 201 + 1 = 666.

It is not a de Polignac number, because 212121112102011 - 2² = 212121112102007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212121112100011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329841715 + ... + 330484188.

It is an arithmetic number, because the mean of its divisors is an integer number (14593202478400).

Almost surely, 2^{212121112102011} is an apocalyptic number.

212121112102011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212121112102011 is a deficient number, since it is larger than the sum of its proper divisors (138115747379589).

212121112102011 is a wasteful number, since it uses less digits than its factorization.

212121112102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660331015 (or 660331012 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212121112102011 its reverse (110201211121212), we get a palindrome (322322323223223).

The spelling of 212121112102011 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twelve million, one hundred two thousand, eleven".