220001203123 has 24 divisors (see below), whose sum is σ = 254647018080. Its totient is φ = 189510647040.

The previous prime is 220001203061. The next prime is 220001203139. The reversal of 220001203123 is 321302100022.

It is not a de Polignac number, because 220001203123 - 2²⁹ = 219464332211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220001203097 and 220001203106.

It is not an unprimeable number, because it can be changed into a prime (220001203153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 530868 + ... + 849601.

It is an arithmetic number, because the mean of its divisors is an integer number (10610292420).

Almost surely, 2^220001203123 is an apocalyptic number.

220001203123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

220001203123 is a deficient number, since it is larger than the sum of its proper divisors (34645814957).

220001203123 is a wasteful number, since it uses less digits than its factorization.

220001203123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380559 (or 1380546 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 220001203123 its reverse (321302100022), we get a palindrome (541303303145).

The spelling of 220001203123 in words is "two hundred twenty billion, one million, two hundred three thousand, one hundred twenty-three".