221001020001010 has 16 divisors (see below), whose sum is σ = 397805786338176. Its totient is φ = 88399530147888.

The previous prime is 221001020000993. The next prime is 221001020001017. The reversal of 221001020001010 is 10100020100122.

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

It is not an unprimeable number, because it can be changed into a prime (221001020001017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108673722 + ... + 110688661.

It is an arithmetic number, because the mean of its divisors is an integer number (24862861646136).

Almost surely, 2^{221001020001010} is an apocalyptic number.

221001020001010 is a deficient number, since it is larger than the sum of its proper divisors (176804766337166).

221001020001010 is a wasteful number, since it uses less digits than its factorization.

221001020001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219463137.

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

Adding to 221001020001010 its reverse (10100020100122), we get a palindrome (231101040101132).

The spelling of 221001020001010 in words is "two hundred twenty-one trillion, one billion, twenty million, one thousand, ten".