221010010210 has 24 divisors (see below), whose sum is σ = 437271047388. Its totient is φ = 80367276000.

The previous prime is 221010010187. The next prime is 221010010211. The reversal of 221010010210 is 12010010122.

It can be written as a sum of positive squares in 2 ways, for example, as 221000591449 + 9418761 = 470107^2 + 3069^2 .

It is a super-2 number, since 2×221010010210² (a number of 23 digits) contains 22 as substring.

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 (221010010211) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 91325241 + ... + 91327660.

Almost surely, 2^221010010210 is an apocalyptic number.

221010010210 is a deficient number, since it is larger than the sum of its proper divisors (216261037178).

221010010210 is a wasteful number, since it uses less digits than its factorization.

221010010210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182652930 (or 182652919 counting only the distinct ones).

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

Adding to 221010010210 its reverse (12010010122), we get a palindrome (233020020332).

The spelling of 221010010210 in words is "two hundred twenty-one billion, ten million, ten thousand, two hundred ten".