220123212001 has 12 divisors (see below), whose sum is σ = 279340032240. Its totient is φ = 171524580360.

The previous prime is 220123211999. The next prime is 220123212007. The reversal of 220123212001 is 100212321022.

It is a happy number.

It is not a de Polignac number, because 220123212001 - 2¹ = 220123211999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220123212007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204195391 + ... + 204196468.

It is an arithmetic number, because the mean of its divisors is an integer number (23278336020).

Almost surely, 2^220123212001 is an apocalyptic number.

It is an amenable number.

220123212001 is a deficient number, since it is larger than the sum of its proper divisors (59216820239).

220123212001 is a wasteful number, since it uses less digits than its factorization.

220123212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408391884 (or 408391877 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 220123212001 its reverse (100212321022), we get a palindrome (320335533023).

The spelling of 220123212001 in words is "two hundred twenty billion, one hundred twenty-three million, two hundred twelve thousand, one".