121302021120 has 176 divisors, whose sum is σ = 443402602368. Its totient is φ = 27726151680.

The previous prime is 121302021101. The next prime is 121302021133. The reversal of 121302021120 is 21120203121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121302021120.

It is a congruent number.

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, 456571 + ... + 671610.

It is an arithmetic number, because the mean of its divisors is an integer number (2519332968).

Almost surely, 2^121302021120 is an apocalyptic number.

121302021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121302021120 is an abundant number, since it is smaller than the sum of its proper divisors (322100581248).

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

121302021120 is a wasteful number, since it uses less digits than its factorization.

121302021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128216 (or 1128198 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121302021120 its reverse (21120203121), we get a palindrome (142422224241).

The spelling of 121302021120 in words is "one hundred twenty-one billion, three hundred two million, twenty-one thousand, one hundred twenty".