121221012032 has 28 divisors (see below), whose sum is σ = 251006555136. Its totient is φ = 57975265920.

The previous prime is 121221012007. The next prime is 121221012097. The reversal of 121221012032 is 230210122121.

It is a self number, because there is not a number n which added to its sum of digits gives 121221012032.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41174144 + ... + 41177087.

Almost surely, 2^121221012032 is an apocalyptic number.

It is an amenable number.

121221012032 is an abundant number, since it is smaller than the sum of its proper divisors (129785543104).

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

121221012032 is an equidigital number, since it uses as much as digits as its factorization.

121221012032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82351266 (or 82351256 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121221012032 its reverse (230210122121), we get a palindrome (351431134153).

The spelling of 121221012032 in words is "one hundred twenty-one billion, two hundred twenty-one million, twelve thousand, thirty-two".