11202120001 has 4 divisors (see below), whose sum is σ = 11218522032. Its totient is φ = 11185717972.

The previous prime is 11202119993. The next prime is 11202120049. The reversal of 11202120001 is 10002120211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10002120211 = 223 ⋅44852557.

It is a cyclic number.

It is not a de Polignac number, because 11202120001 - 2³ = 11202119993 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 11202120001.

It is not an unprimeable number, because it can be changed into a prime (11202120401) 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, 8199991 + ... + 8201356.

It is an arithmetic number, because the mean of its divisors is an integer number (2804630508).

Almost surely, 2^11202120001 is an apocalyptic number.

It is an amenable number.

11202120001 is a deficient number, since it is larger than the sum of its proper divisors (16402031).

11202120001 is an equidigital number, since it uses as much as digits as its factorization.

11202120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16402030.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11202120001 its reverse (10002120211), we get a palindrome (21204240212).

The spelling of 11202120001 in words is "eleven billion, two hundred two million, one hundred twenty thousand, one".