121641601200 has 120 divisors (see below), whose sum is σ = 445324140288. Its totient is φ = 27803792640.

The previous prime is 121641601129. The next prime is 121641601201. The reversal of 121641601200 is 2106146121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (121641601201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7232172 + ... + 7248971.

Almost surely, 2^121641601200 is an apocalyptic number.

121641601200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121641601200 is an abundant number, since it is smaller than the sum of its proper divisors (323682539088).

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

121641601200 is a wasteful number, since it uses less digits than its factorization.

121641601200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481171 (or 14481160 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 121641601200 its reverse (2106146121), we get a palindrome (123747747321).

The spelling of 121641601200 in words is "one hundred twenty-one billion, six hundred forty-one million, six hundred one thousand, two hundred".