1221113122210 has 16 divisors (see below), whose sum is σ = 2198235672000. Its totient is φ = 488393681776.

The previous prime is 1221113122133. The next prime is 1221113122211. The reversal of 1221113122210 is 122213111221.

It is a super-2 number, since 2×1221113122210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221113122211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6346360 + ... + 6535939.

It is an arithmetic number, because the mean of its divisors is an integer number (137389729500).

Almost surely, 2^{1221113122210} is an apocalyptic number.

1221113122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221113122210 is a deficient number, since it is larger than the sum of its proper divisors (977122549790).

1221113122210 is a wasteful number, since it uses less digits than its factorization.

1221113122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12891785.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1221113122210 its reverse (122213111221), we get a palindrome (1343326233431).

The spelling of 1221113122210 in words is "one trillion, two hundred twenty-one billion, one hundred thirteen million, one hundred twenty-two thousand, two hundred ten".