11212202121101 has 6 divisors (see below), whose sum is σ = 11427744635370. Its totient is φ = 11000651134928.

The previous prime is 11212202121053. The next prime is 11212202121103. The reversal of 11212202121101 is 10112120221211.

It can be written as a sum of positive squares in 3 ways, for example, as 7165788256201 + 4046413864900 = 2676899^2 + 2011570^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11212202121101 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 11212202121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212202121103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1995761186 + ... + 1995766803.

It is an arithmetic number, because the mean of its divisors is an integer number (1904624105895).

Almost surely, 2^{11212202121101} is an apocalyptic number.

It is an amenable number.

11212202121101 is a deficient number, since it is larger than the sum of its proper divisors (215542514269).

11212202121101 is an frugal number, since it uses more digits than its factorization.

11212202121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991528095 (or 3991528042 counting only the distinct ones).

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

Adding to 11212202121101 its reverse (10112120221211), we get a palindrome (21324322342312).

The spelling of 11212202121101 in words is "eleven trillion, two hundred twelve billion, two hundred two million, one hundred twenty-one thousand, one hundred one".