121210120111985 has 32 divisors (see below), whose sum is σ = 146637277420032. Its totient is φ = 96180329456640.

The previous prime is 121210120111981. The next prime is 121210120112009. The reversal of 121210120111985 is 589111021012121.

It is not a de Polignac number, because 121210120111985 - 2² = 121210120111981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121210120111981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1111322564 + ... + 1111431626.

It is an arithmetic number, because the mean of its divisors is an integer number (4582414919376).

Almost surely, 2^{121210120111985} is an apocalyptic number.

It is an amenable number.

121210120111985 is a deficient number, since it is larger than the sum of its proper divisors (25427157308047).

121210120111985 is a wasteful number, since it uses less digits than its factorization.

121210120111985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111713.

The product of its (nonzero) digits is 2880, while the sum is 35.

The spelling of 121210120111985 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, one hundred eleven thousand, nine hundred eighty-five".