111100222122021 has 36 divisors (see below), whose sum is σ = 176430988974240. Its totient is φ = 67319074297200.

The previous prime is 111100222122013. The next prime is 111100222122103. The reversal of 111100222122021 is 120221222001111.

It is not a de Polignac number, because 111100222122021 - 2³ = 111100222122013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111100222121985 and 111100222122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100222122121) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5806515 + ... + 15997376.

It is an arithmetic number, because the mean of its divisors is an integer number (4900860804840).

Almost surely, 2^{111100222122021} is an apocalyptic number.

111100222122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111100222122021 is a deficient number, since it is larger than the sum of its proper divisors (65330766852219).

111100222122021 is a wasteful number, since it uses less digits than its factorization.

111100222122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21808598 (or 21808584 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111100222122021 its reverse (120221222001111), we get a palindrome (231321444123132).

The spelling of 111100222122021 in words is "one hundred eleven trillion, one hundred billion, two hundred twenty-two million, one hundred twenty-two thousand, twenty-one".