201212233020 has 144 divisors (see below), whose sum is σ = 627118591008. Its totient is φ = 52183180800.

The previous prime is 201212232961. The next prime is 201212233037. The reversal of 201212233020 is 20332212102.

201212233020 is a `hidden beast` number, since 20 + 121 + 223 + 302 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201212232984 and 201212233002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18982362 + ... + 18992958.

Almost surely, 2^201212233020 is an apocalyptic number.

201212233020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201212233020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313559295504).

201212233020 is an abundant number, since it is smaller than the sum of its proper divisors (425906357988).

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

201212233020 is a wasteful number, since it uses less digits than its factorization.

201212233020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13500 (or 13495 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 201212233020 its reverse (20332212102), we get a palindrome (221544445122).

The spelling of 201212233020 in words is "two hundred one billion, two hundred twelve million, two hundred thirty-three thousand, twenty".