111221121221022 has 8 divisors (see below), whose sum is σ = 222442242442056. Its totient is φ = 37073707073672.

The previous prime is 111221121220961. The next prime is 111221121221027. The reversal of 111221121221022 is 220122121122111.

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

111221121221022 is an admirable number.

It is a super-2 number, since 2×111221121221022² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111221121221022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221121221027) 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, 9268426768413 + ... + 9268426768424.

It is an arithmetic number, because the mean of its divisors is an integer number (27805280305257).

Almost surely, 2^{111221121221022} is an apocalyptic number.

111221121221022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

111221121221022 is a wasteful number, since it uses less digits than its factorization.

111221121221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18536853536842.

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

Adding to 111221121221022 its reverse (220122121122111), we get a palindrome (331343242343133).

The spelling of 111221121221022 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty-two".