221012222021 has 8 divisors (see below), whose sum is σ = 221316701760. Its totient is φ = 220707821152.

The previous prime is 221012221973. The next prime is 221012222023. The reversal of 221012222021 is 120222210122.

It is a happy number.

221012222021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221012222021 - 2⁶ = 221012221957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7527656 + ... + 7556958.

It is an arithmetic number, because the mean of its divisors is an integer number (27664587720).

Almost surely, 2^221012222021 is an apocalyptic number.

It is an amenable number.

221012222021 is a deficient number, since it is larger than the sum of its proper divisors (304479739).

221012222021 is an equidigital number, since it uses as much as digits as its factorization.

221012222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39435.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221012222021 its reverse (120222210122), we get a palindrome (341234432143).

The spelling of 221012222021 in words is "two hundred twenty-one billion, twelve million, two hundred twenty-two thousand, twenty-one".