121000719 has 16 divisors (see below), whose sum is σ = 190330880. Its totient is φ = 66912480.

The previous prime is 121000709. The next prime is 121000741. The reversal of 121000719 is 917000121.

It is not a de Polignac number, because 121000719 - 2⁴ = 121000703 is a prime.

It is a super-2 number, since 2×121000719² = 29282347997033922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000695 and 121000704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92284 + ... + 93585.

It is an arithmetic number, because the mean of its divisors is an integer number (11895680).

Almost surely, 2^121000719 is an apocalyptic number.

121000719 is a deficient number, since it is larger than the sum of its proper divisors (69330161).

121000719 is a wasteful number, since it uses less digits than its factorization.

121000719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185910.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 121000719 is about 11000.0326817696. The cubic root of 121000719 is about 494.6097240025.

The spelling of 121000719 in words is "one hundred twenty-one million, seven hundred nineteen", and thus it is an aban number.