1221330302000 has 80 divisors (see below), whose sum is σ = 3055010493600. Its totient is φ = 471686163200.

The previous prime is 1221330301973. The next prime is 1221330302011. The reversal of 1221330302000 is 2030331221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1221330302000² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221330302000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10470710 + ... + 10586709.

It is an arithmetic number, because the mean of its divisors is an integer number (38187631170).

Almost surely, 2^{1221330302000} is an apocalyptic number.

1221330302000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221330302000 is an abundant number, since it is smaller than the sum of its proper divisors (1833680191600).

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

1221330302000 is a wasteful number, since it uses less digits than its factorization.

1221330302000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21057471 (or 21057455 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 1221330302000 its reverse (2030331221), we get a palindrome (1223360633221).

The spelling of 1221330302000 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, three hundred two thousand".