201123212430 has 128 divisors (see below), whose sum is σ = 564767318016. Its totient is φ = 44879184000.

The previous prime is 201123212393. The next prime is 201123212447. The reversal of 201123212430 is 34212321102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 201123212397 and 201123212406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23031165 + ... + 23039895.

It is an arithmetic number, because the mean of its divisors is an integer number (4412244672).

Almost surely, 2^201123212430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201123212430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282383659008).

201123212430 is an abundant number, since it is smaller than the sum of its proper divisors (363644105586).

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

201123212430 is a wasteful number, since it uses less digits than its factorization.

201123212430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11342.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 201123212430 its reverse (34212321102), we get a palindrome (235335533532).

The spelling of 201123212430 in words is "two hundred one billion, one hundred twenty-three million, two hundred twelve thousand, four hundred thirty".