1221020233030 has 64 divisors (see below), whose sum is σ = 2507312646720. Its totient is φ = 424118145024.

The previous prime is 1221020233009. The next prime is 1221020233031. The reversal of 1221020233030 is 303320201221.

It is a junction number, because it is equal to n+sod(n) for n = 1221020232989 and 1221020233007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221020233031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4593501 + ... + 4852039.

It is an arithmetic number, because the mean of its divisors is an integer number (39176760105).

Almost surely, 2^{1221020233030} is an apocalyptic number.

1221020233030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221020233030 is an abundant number, since it is smaller than the sum of its proper divisors (1286292413690).

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

1221020233030 is a wasteful number, since it uses less digits than its factorization.

1221020233030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260713.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 1221020233030 its reverse (303320201221), we get a palindrome (1524340434251).

The spelling of 1221020233030 in words is "one trillion, two hundred twenty-one billion, twenty million, two hundred thirty-three thousand, thirty".