1221213334010 has 16 divisors (see below), whose sum is σ = 2198201169672. Its totient is φ = 488481518400.

The previous prime is 1221213334001. The next prime is 1221213334039. The reversal of 1221213334010 is 104333121221.

It can be written as a sum of positive squares in 4 ways, for example, as 1014030874081 + 207182459929 = 1006991^2 + 455173^2 .

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, 1123100 + ... + 1924520.

Almost surely, 2^{1221213334010} is an apocalyptic number.

1221213334010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221213334010 is a deficient number, since it is larger than the sum of its proper divisors (976987835662).

1221213334010 is a wasteful number, since it uses less digits than its factorization.

1221213334010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953809.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1221213334010 its reverse (104333121221), we get a palindrome (1325546455231).

The spelling of 1221213334010 in words is "one trillion, two hundred twenty-one billion, two hundred thirteen million, three hundred thirty-four thousand, ten".