121901323720 has 32 divisors (see below), whose sum is σ = 299212341120. Its totient is φ = 44327753920.

The previous prime is 121901323693. The next prime is 121901323721. The reversal of 121901323720 is 27323109121.

It is not an unprimeable number, because it can be changed into a prime (121901323721) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 138523792 + ... + 138524671.

It is an arithmetic number, because the mean of its divisors is an integer number (9350385660).

Almost surely, 2^121901323720 is an apocalyptic number.

121901323720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121901323720 is an abundant number, since it is smaller than the sum of its proper divisors (177311017400).

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

121901323720 is a wasteful number, since it uses less digits than its factorization.

121901323720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277048485 (or 277048481 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 121901323720 in words is "one hundred twenty-one billion, nine hundred one million, three hundred twenty-three thousand, seven hundred twenty".