111211122021222 has 32 divisors (see below), whose sum is σ = 225879843541248. Its totient is φ = 36498268194336.

The previous prime is 111211122021211. The next prime is 111211122021257. The reversal of 111211122021222 is 222120221112111.

It is a super-2 number, since 2×111211122021222² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519989248 + ... + 520203075.

It is an arithmetic number, because the mean of its divisors is an integer number (7058745110664).

Almost surely, 2^{111211122021222} is an apocalyptic number.

111211122021222 is an abundant number, since it is smaller than the sum of its proper divisors (114668721520026).

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

111211122021222 is a wasteful number, since it uses less digits than its factorization.

111211122021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040192604.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111211122021222 its reverse (222120221112111), we get a palindrome (333331343133333).

The spelling of 111211122021222 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred twenty-two million, twenty-one thousand, two hundred twenty-two".