11211121202019 has 4 divisors (see below), whose sum is σ = 14948161602696. Its totient is φ = 7474080801344.

The previous prime is 11211121202009. The next prime is 11211121202069. The reversal of 11211121202019 is 91020212111211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11211121202019 - 2⁹ = 11211121201507 is a prime.

It is a super-2 number, since 2×11211121202019² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11211121202019.

It is not an unprimeable number, because it can be changed into a prime (11211121202009) 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, 1868520200334 + ... + 1868520200339.

It is an arithmetic number, because the mean of its divisors is an integer number (3737040400674).

Almost surely, 2^{11211121202019} is an apocalyptic number.

11211121202019 is a deficient number, since it is larger than the sum of its proper divisors (3737040400677).

11211121202019 is an equidigital number, since it uses as much as digits as its factorization.

11211121202019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737040400676.

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 11211121202019 in words is "eleven trillion, two hundred eleven billion, one hundred twenty-one million, two hundred two thousand, nineteen".