1210222220 has 24 divisors (see below), whose sum is σ = 2554375824. Its totient is φ = 481630016.

The previous prime is 1210222217. The next prime is 1210222259. The reversal of 1210222220 is 222220121.

It is a junction number, because it is equal to n+sod(n) for n = 1210222195 and 1210222204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149642 + ... + 157521.

It is an arithmetic number, because the mean of its divisors is an integer number (106432326).

Almost surely, 2^1210222220 is an apocalyptic number.

1210222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210222220 is an abundant number, since it is smaller than the sum of its proper divisors (1344153604).

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

1210222220 is a wasteful number, since it uses less digits than its factorization.

1210222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307369 (or 307367 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1210222220 is about 34788.2483031267. The cubic root of 1210222220 is about 1065.6674664179.

Adding to 1210222220 its reverse (222220121), we get a palindrome (1432442341).

The spelling of 1210222220 in words is "one billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty".