221011020010 has 16 divisors (see below), whose sum is σ = 433985275872. Its totient is φ = 80367643600.

The previous prime is 221011019951. The next prime is 221011020011. The reversal of 221011020010 is 10020110122.

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 (221011020011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004595436 + ... + 1004595655.

It is an arithmetic number, because the mean of its divisors is an integer number (27124079742).

Almost surely, 2^221011020010 is an apocalyptic number.

221011020010 is a deficient number, since it is larger than the sum of its proper divisors (212974255862).

221011020010 is a wasteful number, since it uses less digits than its factorization.

221011020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009191109.

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

Adding to 221011020010 its reverse (10020110122), we get a palindrome (231031130132).

The spelling of 221011020010 in words is "two hundred twenty-one billion, eleven million, twenty thousand, ten".