121202211011985 has 48 divisors (see below), whose sum is σ = 216653654206080. Its totient is φ = 62650557930240.

The previous prime is 121202211011983. The next prime is 121202211012121. The reversal of 121202211011985 is 589110112202121.

It is a happy number.

121202211011985 is a `hidden beast` number, since 121 + 20 + 221 + 101 + 198 + 5 = 666.

It is not a de Polignac number, because 121202211011985 - 2¹ = 121202211011983 is a prime.

It is a super-3 number, since 3×121202211011985³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121202211011983) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 321294244 + ... + 321671253.

It is an arithmetic number, because the mean of its divisors is an integer number (4513617795960).

Almost surely, 2^{121202211011985} is an apocalyptic number.

121202211011985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121202211011985 is a deficient number, since it is larger than the sum of its proper divisors (95451443194095).

121202211011985 is a wasteful number, since it uses less digits than its factorization.

121202211011985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642965638 (or 642965635 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 36.

The spelling of 121202211011985 in words is "one hundred twenty-one trillion, two hundred two billion, two hundred eleven million, eleven thousand, nine hundred eighty-five".