11211210021222 has 64 divisors (see below), whose sum is σ = 25229055456000. Its totient is φ = 3735932409864.

The previous prime is 11211210021211. The next prime is 11211210021223. The reversal of 11211210021222 is 22212001211211.

11211210021222 is a `hidden beast` number, since 1 + 1 + 211 + 210 + 0 + 21 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11211210021195 and 11211210021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211210021223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14041353 + ... + 14818299.

It is an arithmetic number, because the mean of its divisors is an integer number (394203991500).

Almost surely, 2^{11211210021222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11211210021222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12614527728000).

11211210021222 is an abundant number, since it is smaller than the sum of its proper divisors (14017845434778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11211210021222 is an frugal number, since it uses more digits than its factorization.

11211210021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780269 (or 780251 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11211210021222 its reverse (22212001211211), we get a palindrome (33423211232433).

The spelling of 11211210021222 in words is "eleven trillion, two hundred eleven billion, two hundred ten million, twenty-one thousand, two hundred twenty-two".