1210221010 has 32 divisors (see below), whose sum is σ = 2224541232. Its totient is φ = 473932800.

The previous prime is 1210220989. The next prime is 1210221013. The reversal of 1210221010 is 101220121.

It can be written as a sum of positive squares in 8 ways, for example, as 1031116321 + 179104689 = 32111^2 + 13383^2 .

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 (1210221013) 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, 93960 + ... + 106060.

Almost surely, 2^1210221010 is an apocalyptic number.

1210221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1210221010 is a deficient number, since it is larger than the sum of its proper divisors (1014320222).

1210221010 is a wasteful number, since it uses less digits than its factorization.

1210221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12318.

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

The square root of 1210221010 is about 34788.2309121921. The cubic root of 1210221010 is about 1065.6671112606.

Adding to 1210221010 its reverse (101220121), we get a palindrome (1311441131).

The spelling of 1210221010 in words is "one billion, two hundred ten million, two hundred twenty-one thousand, ten".