11211222101 has 8 divisors (see below), whose sum is σ = 11877848280. Its totient is φ = 10545389568.

The previous prime is 11211222083. The next prime is 11211222103. The reversal of 11211222101 is 10122211211.

It can be written as a sum of positive squares in 4 ways, for example, as 1260960100 + 9950262001 = 35510^2 + 99751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11211222101 - 2³⁰ = 10137480277 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 (11211222103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169196 + ... + 225941.

It is an arithmetic number, because the mean of its divisors is an integer number (1484731035).

Almost surely, 2^11211222101 is an apocalyptic number.

It is an amenable number.

11211222101 is a deficient number, since it is larger than the sum of its proper divisors (666626179).

11211222101 is a wasteful number, since it uses less digits than its factorization.

11211222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396823.

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

Adding to 11211222101 its reverse (10122211211), we get a palindrome (21333433312).

It can be divided in two parts, 11 and 211222101, that added together give a palindrome (211222112).

The spelling of 11211222101 in words is "eleven billion, two hundred eleven million, two hundred twenty-two thousand, one hundred one".