22121212212019 has 4 divisors (see below), whose sum is σ = 22142022384496. Its totient is φ = 22100402039544.

The previous prime is 22121212211963. The next prime is 22121212212049. The reversal of 22121212212019 is 91021221212122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121212212019 is a prime.

It is a super-2 number, since 2×22121212212019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121212212049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10405084644 + ... + 10405086769.

It is an arithmetic number, because the mean of its divisors is an integer number (5535505596124).

Almost surely, 2^{22121212212019} is an apocalyptic number.

22121212212019 is a deficient number, since it is larger than the sum of its proper divisors (20810172477).

22121212212019 is a wasteful number, since it uses less digits than its factorization.

22121212212019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20810172476.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 22121212212019 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, nineteen".