211102021221101 has 4 divisors (see below), whose sum is σ = 213473954043900. Its totient is φ = 208730088398304.

The previous prime is 211102021221073. The next prime is 211102021221107. The reversal of 211102021221101 is 101122120201112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21237074056900 + 189864947164201 = 4608370^2 + 13779149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211102021221101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211102021221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102021221107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1185966411266 + ... + 1185966411443.

It is an arithmetic number, because the mean of its divisors is an integer number (53368488510975).

Almost surely, 2^{211102021221101} is an apocalyptic number.

It is an amenable number.

211102021221101 is a deficient number, since it is larger than the sum of its proper divisors (2371932822799).

211102021221101 is an equidigital number, since it uses as much as digits as its factorization.

211102021221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371932822798.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211102021221101 its reverse (101122120201112), we get a palindrome (312224141422213).

The spelling of 211102021221101 in words is "two hundred eleven trillion, one hundred two billion, twenty-one million, two hundred twenty-one thousand, one hundred one".