121001000221220 has 72 divisors (see below), whose sum is σ = 295641039637440. Its totient is φ = 41478635190720.

The previous prime is 121001000221201. The next prime is 121001000221331. The reversal of 121001000221220 is 22122000100121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 121001000221195 and 121001000221204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5562710 + ... + 16521069.

It is an arithmetic number, because the mean of its divisors is an integer number (4106125550520).

Almost surely, 2^{121001000221220} is an apocalyptic number.

121001000221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001000221220 is an abundant number, since it is smaller than the sum of its proper divisors (174640039416220).

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

121001000221220 is a wasteful number, since it uses less digits than its factorization.

121001000221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22089393 (or 22089384 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121001000221220 its reverse (22122000100121), we get a palindrome (143123000321341).

The spelling of 121001000221220 in words is "one hundred twenty-one trillion, one billion, two hundred twenty-one thousand, two hundred twenty".