121286899 has 4 divisors (see below), whose sum is σ = 127670440. Its totient is φ = 114903360.

The previous prime is 121286887. The next prime is 121286909. The reversal of 121286899 is 998682121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998682121 = 73 ⋅13680577.

It is a cyclic number.

It is not a de Polignac number, because 121286899 - 2⁷ = 121286771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121286819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3191742 + ... + 3191779.

It is an arithmetic number, because the mean of its divisors is an integer number (31917610).

Almost surely, 2^121286899 is an apocalyptic number.

121286899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121286899 is a deficient number, since it is larger than the sum of its proper divisors (6383541).

121286899 is an equidigital number, since it uses as much as digits as its factorization.

121286899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383540.

The product of its digits is 124416, while the sum is 46.

The square root of 121286899 is about 11013.0331425997. The cubic root of 121286899 is about 494.9993524462. Note that the first 3 decimals are identical.

The spelling of 121286899 in words is "one hundred twenty-one million, two hundred eighty-six thousand, eight hundred ninety-nine".