1221301210 has 32 divisors (see below), whose sum is σ = 2236082112. Its totient is φ = 480205440.

The previous prime is 1221301163. The next prime is 1221301223. The reversal of 1221301210 is 121031221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135814 + ... + 144526.

It is an arithmetic number, because the mean of its divisors is an integer number (69877566).

Almost surely, 2^1221301210 is an apocalyptic number.

1221301210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221301210 is a deficient number, since it is larger than the sum of its proper divisors (1014780902).

1221301210 is a wasteful number, since it uses less digits than its factorization.

1221301210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8958.

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

The square root of 1221301210 is about 34947.1201960905. The cubic root of 1221301210 is about 1068.9094808461.

Adding to 1221301210 its reverse (121031221), we get a palindrome (1342332431).

The spelling of 1221301210 in words is "one billion, two hundred twenty-one million, three hundred one thousand, two hundred ten".