1222221210 has 48 divisors (see below), whose sum is σ = 3412246176. Its totient is φ = 279364512.

The previous prime is 1222221197. The next prime is 1222221233. The reversal of 1222221210 is 121222221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1222221210.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 414252 + ... + 417191.

It is an arithmetic number, because the mean of its divisors is an integer number (71088462).

Almost surely, 2^1222221210 is an apocalyptic number.

1222221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222221210 is an abundant number, since it is smaller than the sum of its proper divisors (2190024966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222221210 is a wasteful number, since it uses less digits than its factorization.

1222221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831467 (or 831460 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1222221210 is about 34960.2804622617. The cubic root of 1222221210 is about 1069.1778148406.

Adding to 1222221210 its reverse (121222221), we get a palindrome (1343443431).

The spelling of 1222221210 in words is "one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred ten".