121216020020 has 48 divisors (see below), whose sum is σ = 265719242880. Its totient is φ = 46361183616.

The previous prime is 121216020019. The next prime is 121216020049. The reversal of 121216020020 is 20020612121.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1235699 + ... + 1330181.

It is an arithmetic number, because the mean of its divisors is an integer number (5535817560).

Almost surely, 2^121216020020 is an apocalyptic number.

121216020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121216020020 is an abundant number, since it is smaller than the sum of its proper divisors (144503222860).

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

121216020020 is a wasteful number, since it uses less digits than its factorization.

121216020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97304 (or 97302 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121216020020 its reverse (20020612121), we get a palindrome (141236632141).

The spelling of 121216020020 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty thousand, twenty".