1221002332430 has 32 divisors (see below), whose sum is σ = 2214855342720. Its totient is φ = 484626338560.

The previous prime is 1221002332399. The next prime is 1221002332439. The reversal of 1221002332430 is 342332001221.

It is a junction number, because it is equal to n+sod(n) for n = 1221002332396 and 1221002332405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221002332439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237449 + ... + 1580628.

It is an arithmetic number, because the mean of its divisors is an integer number (69214229460).

Almost surely, 2^{1221002332430} is an apocalyptic number.

1221002332430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221002332430 is a deficient number, since it is larger than the sum of its proper divisors (993853010290).

1221002332430 is a wasteful number, since it uses less digits than its factorization.

1221002332430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818604.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 1221002332430 its reverse (342332001221), we get a palindrome (1563334333651).

The spelling of 1221002332430 in words is "one trillion, two hundred twenty-one billion, two million, three hundred thirty-two thousand, four hundred thirty".