221021022010 has 16 divisors (see below), whose sum is σ = 399018373416. Its totient is φ = 88146067968.

The previous prime is 221021022007. The next prime is 221021022031. The reversal of 221021022010 is 10220120122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 107386634601 + 113634387409 = 327699^2 + 337097^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32789067 + ... + 32795806.

Almost surely, 2^221021022010 is an apocalyptic number.

221021022010 is a deficient number, since it is larger than the sum of its proper divisors (177997351406).

221021022010 is a wasteful number, since it uses less digits than its factorization.

221021022010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65585217.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221021022010 its reverse (10220120122), we get a palindrome (231241142132).

The spelling of 221021022010 in words is "two hundred twenty-one billion, twenty-one million, twenty-two thousand, ten".