121221022020112 has 40 divisors (see below), whose sum is σ = 268420654857536. Its totient is φ = 51951348349056.

The previous prime is 121221022020079. The next prime is 121221022020121. The reversal of 121221022020112 is 211020220122121.

It is a self number, because there is not a number n which added to its sum of digits gives 121221022020112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5986423 + ... + 16681705.

Almost surely, 2^{121221022020112} is an apocalyptic number.

It is an amenable number.

121221022020112 is an abundant number, since it is smaller than the sum of its proper divisors (147199632837424).

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

121221022020112 is a wasteful number, since it uses less digits than its factorization.

121221022020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10796495 (or 10796489 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221022020112 its reverse (211020220122121), we get a palindrome (332241242142233).

The spelling of 121221022020112 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-two million, twenty thousand, one hundred twelve".