1221100333032 has 64 divisors (see below), whose sum is σ = 3134052230400. Its totient is φ = 396236712960.

The previous prime is 1221100333027. The next prime is 1221100333043. The reversal of 1221100333032 is 2303330011221.

It is a super-2 number, since 2×1221100333032² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 908032 + ... + 1807407.

It is an arithmetic number, because the mean of its divisors is an integer number (48969566100).

Almost surely, 2^{1221100333032} is an apocalyptic number.

1221100333032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221100333032 is an abundant number, since it is smaller than the sum of its proper divisors (1912951897368).

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

1221100333032 is a wasteful number, since it uses less digits than its factorization.

1221100333032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715946 (or 2715942 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1221100333032 its reverse (2303330011221), we get a palindrome (3524430344253).

The spelling of 1221100333032 in words is "one trillion, two hundred twenty-one billion, one hundred million, three hundred thirty-three thousand, thirty-two".