201030123220 has 48 divisors (see below), whose sum is σ = 441474219648. Its totient is φ = 76748946560.

The previous prime is 201030123193. The next prime is 201030123227. The reversal of 201030123220 is 22321030102.

It is a super-2 number, since 2×201030123220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201030123194 and 201030123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201030123227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261934 + ... + 686053.

It is an arithmetic number, because the mean of its divisors is an integer number (9197379576).

Almost surely, 2^201030123220 is an apocalyptic number.

201030123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201030123220 is an abundant number, since it is smaller than the sum of its proper divisors (240444096428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201030123220 is a wasteful number, since it uses less digits than its factorization.

201030123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948480 (or 948478 counting only the distinct ones).

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

Adding to 201030123220 its reverse (22321030102), we get a palindrome (223351153322).

The spelling of 201030123220 in words is "two hundred one billion, thirty million, one hundred twenty-three thousand, two hundred twenty".