1221310210 has 8 divisors (see below), whose sum is σ = 2198358396. Its totient is φ = 488524080.

The previous prime is 1221310199. The next prime is 1221310241. The reversal of 1221310210 is 120131221.

It can be written as a sum of positive squares in 2 ways, for example, as 1162741801 + 58568409 = 34099^2 + 7653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61065501 + ... + 61065520.

Almost surely, 2^1221310210 is an apocalyptic number.

1221310210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221310210 is a deficient number, since it is larger than the sum of its proper divisors (977048186).

1221310210 is a wasteful number, since it uses less digits than its factorization.

1221310210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122131028.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1221310210 is about 34947.2489618282. The cubic root of 1221310210 is about 1068.9121065051.

Adding to 1221310210 its reverse (120131221), we get a palindrome (1341441431).

The spelling of 1221310210 in words is "one billion, two hundred twenty-one million, three hundred ten thousand, two hundred ten".