1221010222010 has 16 divisors (see below), whose sum is σ = 2203038878472. Its totient is φ = 487243982400.

The previous prime is 1221010221997. The next prime is 1221010222039. The reversal of 1221010222010 is 102220101221.

It can be written as a sum of positive squares in 4 ways, for example, as 867045909409 + 353964312601 = 931153^2 + 594949^2 .

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, 145008881 + ... + 145017300.

Almost surely, 2^{1221010222010} is an apocalyptic number.

1221010222010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221010222010 is a deficient number, since it is larger than the sum of its proper divisors (982028656462).

1221010222010 is a wasteful number, since it uses less digits than its factorization.

1221010222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290026609.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221010222010 its reverse (102220101221), we get a palindrome (1323230323231).

The spelling of 1221010222010 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred twenty-two thousand, ten".