11211210722 has 8 divisors (see below), whose sum is σ = 16817265900. Its totient is φ = 5605455424.

The previous prime is 11211210721. The next prime is 11211210727. The reversal of 11211210722 is 22701211211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8197310521 + 3013900201 = 90539^2 + 54899^2 .

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

It is a super-2 number, since 2×11211210722² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11211210694 and 11211210703.

It is not an unprimeable number, because it can be changed into a prime (11211210721) 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, 102854 + ... + 181662.

Almost surely, 2^11211210722 is an apocalyptic number.

11211210722 is a deficient number, since it is larger than the sum of its proper divisors (5606055178).

11211210722 is an equidigital number, since it uses as much as digits as its factorization.

11211210722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149940.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 11211210722 its reverse (22701211211), we get a palindrome (33912421933).

The spelling of 11211210722 in words is "eleven billion, two hundred eleven million, two hundred ten thousand, seven hundred twenty-two".