121210120111986 has 24 divisors (see below), whose sum is σ = 276444133589520. Its totient is φ = 38276880035256.

The previous prime is 121210120111981. The next prime is 121210120112009. The reversal of 121210120111986 is 689111021012121.

121210120111986 is a `hidden beast` number, since 121 + 210 + 1 + 201 + 119 + 8 + 6 = 666.

It is a super-3 number, since 3×121210120111986³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121210120111986.

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 11 ways as a sum of consecutive naturals, for example, 177207777600 + ... + 177207778283.

It is an arithmetic number, because the mean of its divisors is an integer number (11518505566230).

Almost surely, 2^{121210120111986} is an apocalyptic number.

121210120111986 is an abundant number, since it is smaller than the sum of its proper divisors (155234013477534).

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

121210120111986 is a wasteful number, since it uses less digits than its factorization.

121210120111986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354415555910 (or 354415555907 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 36.

The spelling of 121210120111986 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, one hundred eleven thousand, nine hundred eighty-six".