221211010 has 32 divisors (see below), whose sum is σ = 422330112. Its totient is φ = 83244480.

The previous prime is 221210993. The next prime is 221211017. The reversal of 221211010 is 10112122.

221211010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (221211017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6147 + ... + 21913.

It is an arithmetic number, because the mean of its divisors is an integer number (13197816).

Almost surely, 2^221211010 is an apocalyptic number.

221211010 is a deficient number, since it is larger than the sum of its proper divisors (201119102).

221211010 is a wasteful number, since it uses less digits than its factorization.

221211010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15858.

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

The square root of 221211010 is about 14873.1640883842. The cubic root of 221211010 is about 604.7867198946.

Adding to 221211010 its reverse (10112122), we get a palindrome (231323132).

The spelling of 221211010 in words is "two hundred twenty-one million, two hundred eleven thousand, ten".