11211021222101 has 4 divisors (see below), whose sum is σ = 11211761287500. Its totient is φ = 11210281156704.

The previous prime is 11211021222077. The next prime is 11211021222113. The reversal of 11211021222101 is 10122212011211.

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 5612468974225 + 5598552247876 = 2369065^2 + 2366126^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211021222101 - 2¹⁰ = 11211021221077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11211021222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211021222701) 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, 370009976 + ... + 370040273.

It is an arithmetic number, because the mean of its divisors is an integer number (2802940321875).

Almost surely, 2^{11211021222101} is an apocalyptic number.

It is an amenable number.

11211021222101 is a deficient number, since it is larger than the sum of its proper divisors (740065399).

11211021222101 is an equidigital number, since it uses as much as digits as its factorization.

11211021222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740065398.

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

Adding to 11211021222101 its reverse (10122212011211), we get a palindrome (21333233233312).

The spelling of 11211021222101 in words is "eleven trillion, two hundred eleven billion, twenty-one million, two hundred twenty-two thousand, one hundred one".