1222210221111 has 48 divisors (see below), whose sum is σ = 1928835836928. Its totient is φ = 739608019200.

The previous prime is 1222210221109. The next prime is 1222210221149. The reversal of 1222210221111 is 1111220122221.

1222210221111 is a `hidden beast` number, since 1 + 222 + 210 + 221 + 1 + 11 = 666.

It is not a de Polignac number, because 1222210221111 - 2¹ = 1222210221109 is a prime.

It is a super-4 number, since 4×1222210221111⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222210221191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221372031 + ... + 221377551.

It is an arithmetic number, because the mean of its divisors is an integer number (40184079936).

Almost surely, 2^{1222210221111} is an apocalyptic number.

1222210221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222210221111 is a deficient number, since it is larger than the sum of its proper divisors (706625615817).

1222210221111 is a wasteful number, since it uses less digits than its factorization.

1222210221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8532 (or 8529 counting only the distinct ones).

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

Adding to 1222210221111 its reverse (1111220122221), we get a palindrome (2333430343332).

The spelling of 1222210221111 in words is "one trillion, two hundred twenty-two billion, two hundred ten million, two hundred twenty-one thousand, one hundred eleven".