1221102211010 has 24 divisors (see below), whose sum is σ = 2415965864508. Its totient is φ = 444037167200.

The previous prime is 1221102210989. The next prime is 1221102211019. The reversal of 1221102211010 is 101122011221.

It can be written as a sum of positive squares in 2 ways, for example, as 1220258250409 + 843960601 = 1104653^2 + 29051^2 .

It is not an unprimeable number, because it can be changed into a prime (1221102211019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 504586481 + ... + 504588900.

Almost surely, 2^{1221102211010} is an apocalyptic number.

1221102211010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221102211010 is a deficient number, since it is larger than the sum of its proper divisors (1194863653498).

1221102211010 is a wasteful number, since it uses less digits than its factorization.

1221102211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009175410 (or 1009175399 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221102211010 its reverse (101122011221), we get a palindrome (1322224222231).

The spelling of 1221102211010 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred eleven thousand, ten".