121216021485 has 192 divisors, whose sum is σ = 229980860928. Its totient is φ = 54275899392.

The previous prime is 121216021483. The next prime is 121216021523. The reversal of 121216021485 is 584120612121.

It is not a de Polignac number, because 121216021485 - 2¹ = 121216021483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121216021481) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 166734192 + ... + 166734918.

It is an arithmetic number, because the mean of its divisors is an integer number (1197816984).

Almost surely, 2^121216021485 is an apocalyptic number.

121216021485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121216021485 is a deficient number, since it is larger than the sum of its proper divisors (108764839443).

121216021485 is a wasteful number, since it uses less digits than its factorization.

121216021485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The spelling of 121216021485 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty-one thousand, four hundred eighty-five".