201171210072 has 64 divisors (see below), whose sum is σ = 576960468480. Its totient is φ = 57258930432.

The previous prime is 201171210067. The next prime is 201171210083. The reversal of 201171210072 is 270012171102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2232333 + ... + 2320700.

It is an arithmetic number, because the mean of its divisors is an integer number (9015007320).

Almost surely, 2^201171210072 is an apocalyptic number.

It is an amenable number.

201171210072 is an abundant number, since it is smaller than the sum of its proper divisors (375789258408).

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

201171210072 is a wasteful number, since it uses less digits than its factorization.

201171210072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553312 (or 4553308 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 24.

Adding to 201171210072 its reverse (270012171102), we get a palindrome (471183381174).

The spelling of 201171210072 in words is "two hundred one billion, one hundred seventy-one million, two hundred ten thousand, seventy-two".