121019986 has 4 divisors (see below), whose sum is σ = 181529982. Its totient is φ = 60509992.

The previous prime is 121019981. The next prime is 121019989. The reversal of 121019986 is 689910121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 85914361 + 35105625 = 9269^2 + 5925^2 .

It is a super-2 number, since 2×121019986² = 29291674022880392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121019981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30254995 + ... + 30254998.

Almost surely, 2^121019986 is an apocalyptic number.

121019986 is a deficient number, since it is larger than the sum of its proper divisors (60509996).

121019986 is an equidigital number, since it uses as much as digits as its factorization.

121019986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60509995.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 121019986 is about 11000.9084170354. The cubic root of 121019986 is about 494.6359749203.

The spelling of 121019986 in words is "one hundred twenty-one million, nineteen thousand, nine hundred eighty-six".