11222121101 has 4 divisors (see below), whose sum is σ = 11297437500. Its totient is φ = 11146804704.

The previous prime is 11222121047. The next prime is 11222121143. The reversal of 11222121101 is 10112122211.

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 2364487876 + 8857633225 = 48626^2 + 94115^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222121101 - 2¹⁴ = 11222104717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222121301) 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, 37657976 + ... + 37658273.

It is an arithmetic number, because the mean of its divisors is an integer number (2824359375).

Almost surely, 2^11222121101 is an apocalyptic number.

It is an amenable number.

11222121101 is a deficient number, since it is larger than the sum of its proper divisors (75316399).

11222121101 is an equidigital number, since it uses as much as digits as its factorization.

11222121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75316398.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11222121101 its reverse (10112122211), we get a palindrome (21334243312).

The spelling of 11222121101 in words is "eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred one".