12121202019 has 16 divisors (see below), whose sum is σ = 17177388800. Its totient is φ = 7581167136.

The previous prime is 12121201997. The next prime is 12121202039. The reversal of 12121202019 is 91020212121.

It is not a de Polignac number, because 12121202019 - 2⁵ = 12121201987 is a prime.

It is a super-2 number, since 2×12121202019² (a number of 21 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 = 12121201986 and 12121202004.

It is not an unprimeable number, because it can be changed into a prime (12121202039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1026424 + ... + 1038165.

It is an arithmetic number, because the mean of its divisors is an integer number (1073586800).

Almost surely, 2^12121202019 is an apocalyptic number.

12121202019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12121202019 is a deficient number, since it is larger than the sum of its proper divisors (5056186781).

12121202019 is a wasteful number, since it uses less digits than its factorization.

12121202019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064714.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 12121202019 in words is "twelve billion, one hundred twenty-one million, two hundred two thousand, nineteen".