21212002111007 has 2 divisors, whose sum is σ = 21212002111008. Its totient is φ = 21212002111006.

The previous prime is 21212002110983. The next prime is 21212002111051. The reversal of 21212002111007 is 70011120021212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21212002111007 - 2¹⁴ = 21212002094623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21212002111007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212002111067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606001055503 + 10606001055504.

It is an arithmetic number, because the mean of its divisors is an integer number (10606001055504).

Almost surely, 2^{21212002111007} is an apocalyptic number.

21212002111007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212002111007 is an equidigital number, since it uses as much as digits as its factorization.

21212002111007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 21212002111007 its reverse (70011120021212), we get a palindrome (91223122132219).

The spelling of 21212002111007 in words is "twenty-one trillion, two hundred twelve billion, two million, one hundred eleven thousand, seven".