121100019 has 16 divisors (see below), whose sum is σ = 165745440. Its totient is φ = 78602240.

The previous prime is 121100017. The next prime is 121100029. The reversal of 121100019 is 910001121.

It is a cyclic number.

It is not a de Polignac number, because 121100019 - 2¹ = 121100017 is a prime.

It is a super-2 number, since 2×121100019² = 29330429203600722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121099980 and 121100007.

It is not an unprimeable number, because it can be changed into a prime (121100011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98899 + ... + 100115.

It is an arithmetic number, because the mean of its divisors is an integer number (10359090).

Almost surely, 2^121100019 is an apocalyptic number.

121100019 is a deficient number, since it is larger than the sum of its proper divisors (44645421).

121100019 is a wasteful number, since it uses less digits than its factorization.

121100019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 121100019 is about 11004.5453790695. The cubic root of 121100019 is about 494.7449885328.

The spelling of 121100019 in words is "one hundred twenty-one million, one hundred thousand, nineteen".