111221011121222 has 16 divisors (see below), whose sum is σ = 170717567702352. Its totient is φ = 54315249891840.

The previous prime is 111221011121221. The next prime is 111221011121237. The reversal of 111221011121222 is 222121110122111.

It is a happy number.

It is a super-2 number, since 2×111221011121222² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111221011121194 and 111221011121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221011121221) 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, 21303179 + ... + 26005142.

It is an arithmetic number, because the mean of its divisors is an integer number (10669847981397).

Almost surely, 2^{111221011121222} is an apocalyptic number.

111221011121222 is a deficient number, since it is larger than the sum of its proper divisors (59496556581130).

111221011121222 is a wasteful number, since it uses less digits than its factorization.

111221011121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47335703.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111221011121222 its reverse (222121110122111), we get a palindrome (333342121243333).

The spelling of 111221011121222 in words is "one hundred eleven trillion, two hundred twenty-one billion, eleven million, one hundred twenty-one thousand, two hundred twenty-two".