121200231144 has 64 divisors (see below), whose sum is σ = 305666519040. Its totient is φ = 40046120640.

The previous prime is 121200231133. The next prime is 121200231157. The reversal of 121200231144 is 441132002121.

It is a self number, because there is not a number n which added to its sum of digits gives 121200231144.

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, 1250559 + ... + 1343985.

It is an arithmetic number, because the mean of its divisors is an integer number (4776039360).

Almost surely, 2^121200231144 is an apocalyptic number.

It is an amenable number.

121200231144 is an abundant number, since it is smaller than the sum of its proper divisors (184466287896).

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

121200231144 is a wasteful number, since it uses less digits than its factorization.

121200231144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93910 (or 93906 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121200231144 its reverse (441132002121), we get a palindrome (562332233265).

The spelling of 121200231144 in words is "one hundred twenty-one billion, two hundred million, two hundred thirty-one thousand, one hundred forty-four".