1221322311230 has 64 divisors (see below), whose sum is σ = 2567534671872. Its totient is φ = 409567130880.

The previous prime is 1221322311227. The next prime is 1221322311233. The reversal of 1221322311230 is 321132231221.

It is an interprime number because it is at equal distance from previous prime (1221322311227) and next prime (1221322311233).

It is a super-2 number, since 2×1221322311230² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221322311196 and 1221322311205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221322311233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5050442 + ... + 5286738.

It is an arithmetic number, because the mean of its divisors is an integer number (40117729248).

Almost surely, 2^{1221322311230} is an apocalyptic number.

1221322311230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221322311230 is an abundant number, since it is smaller than the sum of its proper divisors (1346212360642).

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

1221322311230 is a wasteful number, since it uses less digits than its factorization.

1221322311230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237929.

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

Adding to 1221322311230 its reverse (321132231221), we get a palindrome (1542454542451).

The spelling of 1221322311230 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-two million, three hundred eleven thousand, two hundred thirty".