21212002111006 has 16 divisors (see below), whose sum is σ = 36366858755424. Its totient is φ = 9090001406304.

The previous prime is 21212002110983. The next prime is 21212002111007. The reversal of 21212002111006 is 60011120021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212002111007) 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, 71232885 + ... + 71530048.

It is an arithmetic number, because the mean of its divisors is an integer number (2272928672214).

Almost surely, 2^{21212002111006} is an apocalyptic number.

21212002111006 is a deficient number, since it is larger than the sum of its proper divisors (15154856644418).

21212002111006 is a wasteful number, since it uses less digits than its factorization.

21212002111006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142773555.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21212002111006 its reverse (60011120021212), we get a palindrome (81223122132218).

The spelling of 21212002111006 in words is "twenty-one trillion, two hundred twelve billion, two million, one hundred eleven thousand, six".