121001303220 has 96 divisors (see below), whose sum is σ = 388582500096. Its totient is φ = 27558988800.

The previous prime is 121001303201. The next prime is 121001303231. The reversal of 121001303220 is 22303100121.

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 121001303220.

It is a congruent number.

It is an unprimeable number.

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, 394611 + ... + 630650.

It is an arithmetic number, because the mean of its divisors is an integer number (4047734376).

Almost surely, 2^121001303220 is an apocalyptic number.

121001303220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001303220 is an abundant number, since it is smaller than the sum of its proper divisors (267581196876).

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

121001303220 is a wasteful number, since it uses less digits than its factorization.

121001303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025561 (or 1025559 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121001303220 its reverse (22303100121), we get a palindrome (143304403341).

The spelling of 121001303220 in words is "one hundred twenty-one billion, one million, three hundred three thousand, two hundred twenty".