1222212210 has 16 divisors (see below), whose sum is σ = 2933309376. Its totient is φ = 325923248.

The previous prime is 1222212197. The next prime is 1222212217. The reversal of 1222212210 is 122122221.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222212210.

It is not an unprimeable number, because it can be changed into a prime (1222212217) 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, 20370174 + ... + 20370233.

It is an arithmetic number, because the mean of its divisors is an integer number (183331836).

Almost surely, 2^1222212210 is an apocalyptic number.

1222212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222212210 is an abundant number, since it is smaller than the sum of its proper divisors (1711097166).

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

1222212210 is a wasteful number, since it uses less digits than its factorization.

1222212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40740417.

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

The square root of 1222212210 is about 34960.1517445219. The cubic root of 1222212210 is about 1069.1751904864.

Adding to 1222212210 its reverse (122122221), we get a palindrome (1344334431).

The spelling of 1222212210 in words is "one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred ten".