111202222021 has 16 divisors (see below), whose sum is σ = 122660448768. Its totient is φ = 99972140400.

The previous prime is 111202222003. The next prime is 111202222069. The reversal of 111202222021 is 120222202111.

It is a happy number.

It is not a de Polignac number, because 111202222021 - 2⁹ = 111202221509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111202221986 and 111202222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202222091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589336 + ... + 754798.

It is an arithmetic number, because the mean of its divisors is an integer number (7666278048).

Almost surely, 2^111202222021 is an apocalyptic number.

111202222021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111202222021 is a deficient number, since it is larger than the sum of its proper divisors (11458226747).

111202222021 is a wasteful number, since it uses less digits than its factorization.

111202222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166152.

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

Adding to 111202222021 its reverse (120222202111), we get a palindrome (231424424132).

It can be divided in two parts, 11 and 1202222021, that multiplied together give a palindrome (13224442231).

The spelling of 111202222021 in words is "one hundred eleven billion, two hundred two million, two hundred twenty-two thousand, twenty-one".