11121222019 has 4 divisors (see below), whose sum is σ = 11121814080. Its totient is φ = 11120629960.

The previous prime is 11121221983. The next prime is 11121222023. The reversal of 11121222019 is 91022212111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91022212111 = 40351 ⋅2255761.

It is a cyclic number.

It is not a de Polignac number, because 11121222019 - 2²⁷ = 10987004291 is a prime.

It is a super-2 number, since 2×11121222019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121222089) 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, 266899 + ... + 305740.

It is an arithmetic number, because the mean of its divisors is an integer number (2780453520).

Almost surely, 2^11121222019 is an apocalyptic number.

11121222019 is a deficient number, since it is larger than the sum of its proper divisors (592061).

11121222019 is an equidigital number, since it uses as much as digits as its factorization.

11121222019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592060.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 11121222019 in words is "eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, nineteen".