221201001010 has 32 divisors (see below), whose sum is σ = 434380931712. Its totient is φ = 80432542080.

The previous prime is 221201000989. The next prime is 221201001089. The reversal of 221201001010 is 10100102122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2750734 + ... + 2830006.

It is an arithmetic number, because the mean of its divisors is an integer number (13574404116).

Almost surely, 2^221201001010 is an apocalyptic number.

221201001010 is a deficient number, since it is larger than the sum of its proper divisors (213179930702).

221201001010 is a wasteful number, since it uses less digits than its factorization.

221201001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104658.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221201001010 its reverse (10100102122), we get a palindrome (231301103132).

The spelling of 221201001010 in words is "two hundred twenty-one billion, two hundred one million, one thousand, ten".