201212155000 has 80 divisors (see below), whose sum is σ = 472169701080. Its totient is φ = 80360304000.

The previous prime is 201212154967. The next prime is 201212155003. The reversal of 201212155000 is 551212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212155003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3234187 + ... + 3295813.

Almost surely, 2^201212155000 is an apocalyptic number.

201212155000 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 201212155000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236084850540).

201212155000 is an abundant number, since it is smaller than the sum of its proper divisors (270957546080).

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

201212155000 is an equidigital number, since it uses as much as digits as its factorization.

201212155000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62306 (or 62287 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 201212155000 its reverse (551212102), we get a palindrome (201763367102).

The spelling of 201212155000 in words is "two hundred one billion, two hundred twelve million, one hundred fifty-five thousand".