121886686029 has 16 divisors (see below), whose sum is σ = 165762288000. Its totient is φ = 79637777856.

The previous prime is 121886686021. The next prime is 121886686091. The reversal of 121886686029 is 920686688121.

It is a happy number.

It is not a de Polignac number, because 121886686029 - 2³ = 121886686021 is a prime.

It is a super-2 number, since 2×121886686029² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121886686029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121886686021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270954 + ... + 563195.

It is an arithmetic number, because the mean of its divisors is an integer number (10360143000).

Almost surely, 2^121886686029 is an apocalyptic number.

It is an amenable number.

121886686029 is a deficient number, since it is larger than the sum of its proper divisors (43875601971).

121886686029 is an equidigital number, since it uses as much as digits as its factorization.

121886686029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835124.

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 121886686029 in words is "one hundred twenty-one billion, eight hundred eighty-six million, six hundred eighty-six thousand, twenty-nine".