22121212123 has 8 divisors (see below), whose sum is σ = 22198209488. Its totient is φ = 22044282624.

The previous prime is 22121212121. The next prime is 22121212153. The reversal of 22121212123 is 32121212122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22121212123 - 2¹ = 22121212121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121212123.

It is not an unprimeable number, because it can be changed into a prime (22121212121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686215 + ... + 717727.

It is an arithmetic number, because the mean of its divisors is an integer number (2774776186).

Almost surely, 2^22121212123 is an apocalyptic number.

22121212123 is a deficient number, since it is larger than the sum of its proper divisors (76997365).

22121212123 is a wasteful number, since it uses less digits than its factorization.

22121212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33933.

The product of its digits is 192, while the sum is 19.

Adding to 22121212123 its reverse (32121212122), we get a palindrome (54242424245).

Subtracting 22121212123 from its reverse (32121212122), we obtain a palindrome (9999999999).

The spelling of 22121212123 in words is "twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-three".