1221335450700 has 144 divisors (see below), whose sum is σ = 3547320623616. Its totient is φ = 324439315200.

The previous prime is 1221335450663. The next prime is 1221335450707. The reversal of 1221335450700 is 70545331221.

It is not an unprimeable number, because it can be changed into a prime (1221335450707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87839949 + ... + 87853851.

Almost surely, 2^{1221335450700} is an apocalyptic number.

1221335450700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221335450700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1773660311808).

1221335450700 is an abundant number, since it is smaller than the sum of its proper divisors (2325985172916).

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

1221335450700 is a wasteful number, since it uses less digits than its factorization.

1221335450700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15024 (or 15017 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 1221335450700 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-five million, four hundred fifty thousand, seven hundred".