2101220210111 has 4 divisors (see below), whose sum is σ = 2292240229224. Its totient is φ = 1910200191000.

The previous prime is 2101220210039. The next prime is 2101220210237. The reversal of 2101220210111 is 1110120221012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2101220210111 - 2¹⁰ = 2101220209087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101220210311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95510009540 + ... + 95510009561.

It is an arithmetic number, because the mean of its divisors is an integer number (573060057306).

Almost surely, 2^{2101220210111} is an apocalyptic number.

2101220210111 is a deficient number, since it is larger than the sum of its proper divisors (191020019113).

2101220210111 is a wasteful number, since it uses less digits than its factorization.

2101220210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191020019112.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2101220210111 its reverse (1110120221012), we get a palindrome (3211340431123).

The spelling of 2101220210111 in words is "two trillion, one hundred one billion, two hundred twenty million, two hundred ten thousand, one hundred eleven".