23220212121 has 24 divisors (see below), whose sum is σ = 33903584000. Its totient is φ = 15312942432.

The previous prime is 23220212087. The next prime is 23220212123. The reversal of 23220212121 is 12121202232.

It is not a de Polignac number, because 23220212121 - 2¹⁰ = 23220211097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23220212094 and 23220212103.

It is not an unprimeable number, because it can be changed into a prime (23220212123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 588120 + ... + 626358.

Almost surely, 2^23220212121 is an apocalyptic number.

It is an amenable number.

23220212121 is a deficient number, since it is larger than the sum of its proper divisors (10683371879).

23220212121 is a wasteful number, since it uses less digits than its factorization.

23220212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38973 (or 38970 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 23220212121 its reverse (12121202232), we get a palindrome (35341414353).

The spelling of 23220212121 in words is "twenty-three billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-one".