121533212004 has 12 divisors (see below), whose sum is σ = 283577494704. Its totient is φ = 40511070664.

The previous prime is 121533211999. The next prime is 121533212039. The reversal of 121533212004 is 400212335121.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 5063883822 + ... + 5063883845.

It is an arithmetic number, because the mean of its divisors is an integer number (23631457892).

Almost surely, 2^121533212004 is an apocalyptic number.

It is an amenable number.

121533212004 is an abundant number, since it is smaller than the sum of its proper divisors (162044282700).

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

121533212004 is a wasteful number, since it uses less digits than its factorization.

121533212004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10127767674 (or 10127767672 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 121533212004 its reverse (400212335121), we get a palindrome (521745547125).

The spelling of 121533212004 in words is "one hundred twenty-one billion, five hundred thirty-three million, two hundred twelve thousand, four".