121111002121220 has 24 divisors (see below), whose sum is σ = 254748003508824. Its totient is φ = 48365372457216.

The previous prime is 121111002121217. The next prime is 121111002121243. The reversal of 121111002121220 is 22121200111121.

It can be written as a sum of positive squares in 4 ways, for example, as 588721667524 + 120522280453696 = 767282^2 + 10978264^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4939261889 + ... + 4939286408.

It is an arithmetic number, because the mean of its divisors is an integer number (10614500146201).

Almost surely, 2^{121111002121220} is an apocalyptic number.

121111002121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111002121220 is an abundant number, since it is smaller than the sum of its proper divisors (133637001387604).

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

121111002121220 is a wasteful number, since it uses less digits than its factorization.

121111002121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9878548919 (or 9878548917 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121111002121220 its reverse (22121200111121), we get a palindrome (143232202232341).

The spelling of 121111002121220 in words is "one hundred twenty-one trillion, one hundred eleven billion, two million, one hundred twenty-one thousand, two hundred twenty".