121111001019 has 12 divisors (see below), whose sum is σ = 174981349192. Its totient is φ = 80720712000.

The previous prime is 121111001017. The next prime is 121111001041. The reversal of 121111001019 is 910100111121.

It is not a de Polignac number, because 121111001019 - 2¹ = 121111001017 is a prime.

It is a super-2 number, since 2×121111001019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111000992 and 121111001010.

It is not an unprimeable number, because it can be changed into a prime (121111001017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1624462 + ... + 1697379.

Almost surely, 2^121111001019 is an apocalyptic number.

121111001019 is a deficient number, since it is larger than the sum of its proper divisors (53870348173).

121111001019 is a wasteful number, since it uses less digits than its factorization.

121111001019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325898 (or 3325895 counting only the distinct ones).

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

The spelling of 121111001019 in words is "one hundred twenty-one billion, one hundred eleven million, one thousand, nineteen".