121752032420 has 48 divisors (see below), whose sum is σ = 270888695280. Its totient is φ = 45807366144.

The previous prime is 121752032411. The next prime is 121752032429. The reversal of 121752032420 is 24230257121.

It is an interprime number because it is at equal distance from previous prime (121752032411) and next prime (121752032429).

It can be written as a sum of positive squares in 8 ways, for example, as 72454144 + 121679578276 = 8512^2 + 348826^2 .

It is not an unprimeable number, because it can be changed into a prime (121752032429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435782 + ... + 658338.

It is an arithmetic number, because the mean of its divisors is an integer number (5643514485).

Almost surely, 2^121752032420 is an apocalyptic number.

121752032420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121752032420 is an abundant number, since it is smaller than the sum of its proper divisors (149136662860).

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

121752032420 is a wasteful number, since it uses less digits than its factorization.

121752032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224192 (or 224190 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 121752032420 its reverse (24230257121), we get a palindrome (145982289541).

The spelling of 121752032420 in words is "one hundred twenty-one billion, seven hundred fifty-two million, thirty-two thousand, four hundred twenty".