1220212210 has 40 divisors (see below), whose sum is σ = 2562343596. Its totient is φ = 418350240.

The previous prime is 1220212183. The next prime is 1220212211. The reversal of 1220212210 is 122120221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1139805121 + 80407089 = 33761^2 + 8967^2 .

It is not an unprimeable number, because it can be changed into a prime (1220212211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1401 + ... + 49420.

Almost surely, 2^1220212210 is an apocalyptic number.

1220212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220212210 is an abundant number, since it is smaller than the sum of its proper divisors (1342131386).

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

1220212210 is an frugal number, since it uses more digits than its factorization.

1220212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50856 (or 50835 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220212210 is about 34931.5360383708. The cubic root of 1220212210 is about 1068.5916808450.

Adding to 1220212210 its reverse (122120221), we get a palindrome (1342332431).

The spelling of 1220212210 in words is "one billion, two hundred twenty million, two hundred twelve thousand, two hundred ten".