1221003002032 has 80 divisors (see below), whose sum is σ = 2654574730272. Its totient is φ = 539172495360.

The previous prime is 1221003002029. The next prime is 1221003002041. The reversal of 1221003002032 is 2302003001221.

It is a super-2 number, since 2×1221003002032² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1221003001997 and 1221003002015.

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, 4108768 + ... + 4395904.

Almost surely, 2^{1221003002032} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221003002032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327287365136).

1221003002032 is an abundant number, since it is smaller than the sum of its proper divisors (1433571728240).

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

1221003002032 is a wasteful number, since it uses less digits than its factorization.

1221003002032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287846 (or 287840 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 1221003002032 its reverse (2302003001221), we get a palindrome (3523006003253).

The spelling of 1221003002032 in words is "one trillion, two hundred twenty-one billion, three million, two thousand, thirty-two".