211110202121101 has 4 divisors (see below), whose sum is σ = 213200402142204. Its totient is φ = 209020002100000.

The previous prime is 211110202121087. The next prime is 211110202121129. The reversal of 211110202121101 is 101121202011112.

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 201046905168201 + 10063296952900 = 14179101^2 + 3172270^2 .

It is a cyclic number.

It is not a de Polignac number, because 211110202121101 - 2²¹ = 211110200023949 is a prime.

It is a super-2 number, since 2×211110202121101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211110202121801) 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, 1045100010400 + ... + 1045100010601.

It is an arithmetic number, because the mean of its divisors is an integer number (53300100535551).

Almost surely, 2^{211110202121101} is an apocalyptic number.

It is an amenable number.

211110202121101 is a deficient number, since it is larger than the sum of its proper divisors (2090200021103).

211110202121101 is a wasteful number, since it uses less digits than its factorization.

211110202121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090200021102.

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

Adding to 211110202121101 its reverse (101121202011112), we get a palindrome (312231404132213).

The spelling of 211110202121101 in words is "two hundred eleven trillion, one hundred ten billion, two hundred two million, one hundred twenty-one thousand, one hundred one".