2101212021107 has 2 divisors, whose sum is σ = 2101212021108. Its totient is φ = 2101212021106.

The previous prime is 2101212021079. The next prime is 2101212021143. The reversal of 2101212021107 is 7011202121012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101212021107 - 2³⁴ = 2084032151923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101212021187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050606010553 + 1050606010554.

It is an arithmetic number, because the mean of its divisors is an integer number (1050606010554).

Almost surely, 2^{2101212021107} is an apocalyptic number.

2101212021107 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101212021107 is an equidigital number, since it uses as much as digits as its factorization.

2101212021107 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 2101212021107 its reverse (7011202121012), we get a palindrome (9112414142119).

The spelling of 2101212021107 in words is "two trillion, one hundred one billion, two hundred twelve million, twenty-one thousand, one hundred seven".