121120019 has 4 divisors (see below), whose sum is σ = 128244744. Its totient is φ = 113995296.

The previous prime is 121120009. The next prime is 121120057. The reversal of 121120019 is 910021121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910021121 = 181 ⋅5027741.

It is a cyclic number.

It is not a de Polignac number, because 121120019 - 2⁸ = 121119763 is a prime.

It is a super-2 number, since 2×121120019² = 29340118005120722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7124707 = 121120019 / (1 + 2 + 1 + 1 + 2 + 0 + 0 + 1 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121119979 and 121120006.

It is not an unprimeable number, because it can be changed into a prime (121120009) 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, 3562337 + ... + 3562370.

It is an arithmetic number, because the mean of its divisors is an integer number (32061186).

Almost surely, 2^121120019 is an apocalyptic number.

121120019 is a deficient number, since it is larger than the sum of its proper divisors (7124725).

121120019 is an equidigital number, since it uses as much as digits as its factorization.

121120019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7124724.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 121120019 is about 11005.4540569665. The cubic root of 121120019 is about 494.7722231971.

The spelling of 121120019 in words is "one hundred twenty-one million, one hundred twenty thousand, nineteen".