111220212022 has 4 divisors (see below), whose sum is σ = 166830318036. Its totient is φ = 55610106010.

The previous prime is 111220212013. The next prime is 111220212023. The reversal of 111220212022 is 220212022111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220212022111 = 223 ⋅987497857.

It is a junction number, because it is equal to n+sod(n) for n = 111220211987 and 111220212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220212023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27805053004 + ... + 27805053007.

It is an arithmetic number, because the mean of its divisors is an integer number (41707579509).

Almost surely, 2^111220212022 is an apocalyptic number.

111220212022 is a deficient number, since it is larger than the sum of its proper divisors (55610106014).

111220212022 is an equidigital number, since it uses as much as digits as its factorization.

111220212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55610106013.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111220212022 its reverse (220212022111), we get a palindrome (331432234133).

It can be divided in two parts, 111 and 220212022, that multiplied together give a palindrome (24443534442).

The spelling of 111220212022 in words is "one hundred eleven billion, two hundred twenty million, two hundred twelve thousand, twenty-two".