2101221107 has 2 divisors, whose sum is σ = 2101221108. Its totient is φ = 2101221106.

The previous prime is 2101221047. The next prime is 2101221127. The reversal of 2101221107 is 7011221012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2101221107 - 2⁶ = 2101221043 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050610553 + 1050610554.

It is an arithmetic number, because the mean of its divisors is an integer number (1050610554).

Almost surely, 2^2101221107 is an apocalyptic number.

2101221107 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101221107 is an equidigital number, since it uses as much as digits as its factorization.

2101221107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 2101221107 is about 45839.0783829693. The cubic root of 2101221107 is about 1280.8273270810.

Adding to 2101221107 its reverse (7011221012), we get a palindrome (9112442119).

The spelling of 2101221107 in words is "two billion, one hundred one million, two hundred twenty-one thousand, one hundred seven".