221001001010 has 8 divisors (see below), whose sum is σ = 397801801836. Its totient is φ = 88400400400.

The previous prime is 221001000973. The next prime is 221001001021. The reversal of 221001001010 is 10100100122.

It can be written as a sum of positive squares in 2 ways, for example, as 180571453969 + 40429547041 = 424937^2 + 201071^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11050050041 + ... + 11050050060.

Almost surely, 2^221001001010 is an apocalyptic number.

221001001010 is a deficient number, since it is larger than the sum of its proper divisors (176800800826).

221001001010 is a wasteful number, since it uses less digits than its factorization.

221001001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22100100108.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 221001001010 its reverse (10100100122), we get a palindrome (231101101132).

The spelling of 221001001010 in words is "two hundred twenty-one billion, one million, one thousand, ten".