21010102101007 has 2 divisors, whose sum is σ = 21010102101008. Its totient is φ = 21010102101006.

The previous prime is 21010102100993. The next prime is 21010102101059. The reversal of 21010102101007 is 70010120101012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010102101007 - 2⁷ = 21010102100879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010802101007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505051050503 + 10505051050504.

It is an arithmetic number, because the mean of its divisors is an integer number (10505051050504).

Almost surely, 2^{21010102101007} is an apocalyptic number.

21010102101007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010102101007 is an equidigital number, since it uses as much as digits as its factorization.

21010102101007 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 21010102101007 its reverse (70010120101012), we get a palindrome (91020222202019).

The spelling of 21010102101007 in words is "twenty-one trillion, ten billion, one hundred two million, one hundred one thousand, seven".