111221020200021 has 8 divisors (see below), whose sum is σ = 148294948716480. Its totient is φ = 74147219241792.

The previous prime is 111221020200019. The next prime is 111221020200023. The reversal of 111221020200021 is 120002020122111.

It is an interprime number because it is at equal distance from previous prime (111221020200019) and next prime (111221020200023).

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

It is not a de Polignac number, because 111221020200021 - 2¹ = 111221020200019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221020200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29836180 + ... + 33356253.

It is an arithmetic number, because the mean of its divisors is an integer number (18536868589560).

Almost surely, 2^{111221020200021} is an apocalyptic number.

It is an amenable number.

111221020200021 is a deficient number, since it is larger than the sum of its proper divisors (37073928516459).

111221020200021 is an equidigital number, since it uses as much as digits as its factorization.

111221020200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63779115.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111221020200021 its reverse (120002020122111), we get a palindrome (231223040322132).

The spelling of 111221020200021 in words is "one hundred eleven trillion, two hundred twenty-one billion, twenty million, two hundred thousand, twenty-one".