2101222101 has 8 divisors (see below), whose sum is σ = 3056323104. Its totient is φ = 1273467920.

The previous prime is 2101222087. The next prime is 2101222111. The reversal of 2101222101 is 1012221012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2101222101 - 2⁷ = 2101221973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101222111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31836666 + ... + 31836731.

It is an arithmetic number, because the mean of its divisors is an integer number (382040388).

Almost surely, 2^2101222101 is an apocalyptic number.

It is an amenable number.

2101222101 is a deficient number, since it is larger than the sum of its proper divisors (955101003).

2101222101 is a wasteful number, since it uses less digits than its factorization.

2101222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63673411.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2101222101 is about 45839.0892252453. The cubic root of 2101222101 is about 1280.8275290496.

Adding to 2101222101 its reverse (1012221012), we get a palindrome (3113443113).

It can be divided in two parts, 2 and 101222101, that multiplied together give a palindrome (202444202).

The spelling of 2101222101 in words is "two billion, one hundred one million, two hundred twenty-two thousand, one hundred one".