121301320420 has 96 divisors (see below), whose sum is σ = 307503415296. Its totient is φ = 39311395200.

The previous prime is 121301320417. The next prime is 121301320429. The reversal of 121301320420 is 24023103121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121301320429) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 138376 + ... + 511615.

It is an arithmetic number, because the mean of its divisors is an integer number (3203160576).

Almost surely, 2^121301320420 is an apocalyptic number.

121301320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121301320420 is an abundant number, since it is smaller than the sum of its proper divisors (186202094876).

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

121301320420 is a wasteful number, since it uses less digits than its factorization.

121301320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650081 (or 650079 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121301320420 its reverse (24023103121), we get a palindrome (145324423541).

The spelling of 121301320420 in words is "one hundred twenty-one billion, three hundred one million, three hundred twenty thousand, four hundred twenty".