221112012021 has 8 divisors (see below), whose sum is σ = 297520750560. Its totient is φ = 146055640752.

The previous prime is 221112012013. The next prime is 221112012041. The reversal of 221112012021 is 120210211122.

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

It is not a de Polignac number, because 221112012021 - 2³ = 221112012013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112012041) 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, 338091435 + ... + 338092088.

It is an arithmetic number, because the mean of its divisors is an integer number (37190093820).

Almost surely, 2^221112012021 is an apocalyptic number.

It is an amenable number.

221112012021 is a deficient number, since it is larger than the sum of its proper divisors (76408738539).

221112012021 is a wasteful number, since it uses less digits than its factorization.

221112012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676183635.

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

Adding to 221112012021 its reverse (120210211122), we get a palindrome (341322223143).

The spelling of 221112012021 in words is "two hundred twenty-one billion, one hundred twelve million, twelve thousand, twenty-one".