1221030323310 has 128 divisors (see below), whose sum is σ = 3418364851200. Its totient is φ = 279018832512.

The previous prime is 1221030323297. The next prime is 1221030323327. The reversal of 1221030323310 is 133230301221.

It is a super-2 number, since 2×1221030323310² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45231637 + ... + 45258623.

It is an arithmetic number, because the mean of its divisors is an integer number (26705975400).

Almost surely, 2^{1221030323310} is an apocalyptic number.

1221030323310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221030323310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709182425600).

1221030323310 is an abundant number, since it is smaller than the sum of its proper divisors (2197334527890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221030323310 is a wasteful number, since it uses less digits than its factorization.

1221030323310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31415 (or 31401 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1221030323310 its reverse (133230301221), we get a palindrome (1354260624531).

The spelling of 1221030323310 in words is "one trillion, two hundred twenty-one billion, thirty million, three hundred twenty-three thousand, three hundred ten".