21111002100007 has 2 divisors, whose sum is σ = 21111002100008. Its totient is φ = 21111002100006.

The previous prime is 21111002099989. The next prime is 21111002100017. The reversal of 21111002100007 is 70000120011112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111002100007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21111002100017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555501050003 + 10555501050004.

It is an arithmetic number, because the mean of its divisors is an integer number (10555501050004).

Almost surely, 2^{21111002100007} is an apocalyptic number.

21111002100007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111002100007 is an equidigital number, since it uses as much as digits as its factorization.

21111002100007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 21111002100007 its reverse (70000120011112), we get a palindrome (91111122111119).

The spelling of 21111002100007 in words is "twenty-one trillion, one hundred eleven billion, two million, one hundred thousand, seven".